@Elroy79,
Firstly, thanks for considering about my feelings even though I wasn't offended in any way. I don't recall seeing any personal attack, offensive terms/languange, mocking/insult, "things better left unsaid", troll comment, or offensive intent in our conversations. So yeah, idk about others (since I didn't go deep into your conversations with others but I did notice some heat) but we're good and your humility expressed and dedication invested in our discussed topics are appreciated. Though I have to say I'll be readily moving on after this post of comments as I feel that I have already shared enough personal opinions /perspectives for this minor arc, and we don't have to agree on everything which that's totally fine as long as it's respectful and civil. I personally find different interpretations are expected and fine, for me it'd be the same energy as "I like orange, it's sweet and sour I enjoy it, and I dislike apple. You like apple more? oh okay, we can enjoy having what we like, cheers". I just don't really get the extra heated emotions and anger/frustration over a fictional non-evil misguided hurt sad 11y.o. girl that still has a lot of personal growth and improvements to go through, her character with such an initially flawed views and resentful cynical attitude makes total sense.
Secondly, about Ars, I'd say it's currently up to personal interpretations. There may or may not be a canonical explanation, but either way I wouldn't say Ars was experienced/knowledgeable in recruiting people in the first place and it's perfectly fine that he makes mistakes and learns from them, this kind of mistakes/events are rationally inevitable as part of his character growth, pushing him to develop his resolutions and skills to be a more well-rounded lord as a former non-fantasy modern-day pushover average Japanese depressed office worker. I think too many isekai/reincarnation series has been much more convenient that we're too used to that and thought that'd be the "standard" and deviation of that easily gains polarizing/strong opinions... Isekai/Reincarnation the theme/concept is already convenient in the first place when it's practically about getting second chances(or more) at life. If convenience of plot is a concern, it should be more about the degree/level of the convenience and not the existence of having convenience, and so it's not a theme for readers that don't expect some level of convenience or got tired/sick of it (people's tastes/interests change and that's fine, there are many other genres/themes that may reignite their passion for manga reading, if not they can always take a break or invest in other/new hobbies instead of getting frustrated over not enjoying reading mangas as much as before or feeling disappointed/dissatisfied easily frequently, I honestly feel that many people don't realize that about themselves). Another idea (which I think is more realistic too assuming reincarnation is real) to be considered about Ars' immaturity/limitation I'd like to propose is, imperfection of human memories and stagnation of wisdom/personality development. What I referred to is about how we humans (most humans at least) can't perfectly recall all memories and knowledges, we forget about things all the time including stuff we did or thought about moments ago/earlier today, or stuff we studied and learnt. There are cases/articles (real or not is beside the point) of reincarnated kids revealing things that turned out to be accurate in real life, but many of them gradually lost their past life memories and became normal kids over time. About stagnation of personality/wisdom development, I'd say it's quite logical that a 35y.o. pushover depressed mediocre Japanese office worker without a gf that basically didn't have a life but only living like a gear wheel in the corporation clockwork system, hadn't been able to go through many different life experiences weren't able to gain enough experiences/perspectives to develop much of his personality and life wisdom. By applying these logics, whether it's gonna be explicitly canonically explained by author or not, currently my interpretation about Ars being so childish genius kid yet can't fully utilize his past adult life and knowledges, is that his past life memories and knowledges are like distant memories that cannot be fully recalled, and his personality used to be a pushover obedient mediocre person without leadership and sociable qualities to can easily earn people's trust and popularity, he's designed to slowly improve over time and make many mistakes along the way. I think this is more relatable and challenging for a character like that too than the usual popular depiction (that we're so used to that it kinda becomes another expected "standard" of isekai/reincarnation) in which the MC somehow can fully recall so many past memories that allow them to "invent"/construct lots of modern stuff that most average people wouldn't have known (the partial or full processes) in the first place, and I'm not referring to basic food recipes (I can't even remember the ingredients and amount to use and exact steps for most complicated food recipes). Book, toilet bowl, firearms, alcohol, food/desserts, clothes, etc. Many adults in reality are immature, not knowledgeable, forgetful, inexperienced, unskillful, and/or mediocrely intelligent at best. Many adults don't/can't do things well, are overconfident, awkward and not sociable, make many mistakes in life too. Ars got overexcited about getting and living 2nd chance at life and is unable to be fully adulting perfectly, is really fine and this chp of misstep in recruiting people is redeemable and understandable. Philosophical or not the dialogue was, wasn't the main or only reason he's so defeated, but more about the relentless rejection and cruelty of the reality got him thinking deeper about his resolutions, visions and ideals, the effectiveness and efficiency of his approaches, etc, it's a moment of introspection, he's bound to make many hard decisions later on as we kinda anticipate he's gonna be the emperor eventually, and that fantasy medieval emperor journey by a former relatively-peaceful modern Japanese office worker, it's very reasonable that it's his first time encountering this harsh topic he didn't know well enough and had some sociocultural shock. I personally believe his character will become wiser and better as he gains more experiences.
Finally, for Charlotte, I suppose we basically agree that she's an understandable albeit self-defeating character. As you said about the mental shackles, I also said similarly about her being not in the right state of mind/heart with her very limited inexperienced worldviews. It's a real thing and realistic for her designed to act like that when she's in such a mental space. Your point about Ritsu's presence I think isn't that significant for a character like Charlotte as she's not mentally ready to exchange perspective-clashes at that point in that state, especially not with a kid she just stole and escaped from nor the bodyguard that threw knifes at her, regardless of Ritsu's race/background (whether Charlotte knows enough about the racial political treatments of Marca or even general knowledge is also arguable). Ritsu, in a sense, could be seen more like a sellout who side with the "villainous nobles" from her perspective at that point. To her, whatever they said could be just lies and manipulations to get her. She's already paranoid, cynical, hangry and was on the run, 11y.o. her in that state just couldn't think and process information properly and make perfect decisions/arguments, and that makes sense. They need an event, something to happen, to shake her beliefs/prejudice, to regain faith in humanity and trust in people, and that's what happening now and later, it's a fine arc with vulnerable characters and growths.
Anyway, that's all. In short, my points are basically: Charlotte is an okay character, Ars is also an okay character, they are understandably flawed human characters with personal growth spaces, it's a fine arc fine plot, not as Extra stupid/trashy/controversial as some comments made it seemed to be. My comments have been very lengthy and so thanks for reading lol.