@cor3zone
Disclaimer - I am not presenting those so we can have a debate over them, since I am sure you will come up with various reasons to defend the manga - it's just that those reason will not be in the manga itself, but will be your conjectures or whatever. If you can factually disprove them - as in they are not in the manga, then sure - go ahead.
Chapter 1:
Weak exposition consisting of just writing out minimal details to present the setting and forced interactions, cliche developments. Could be improved upon through "show don't tell", and obviously fixing the interactions.
First few pages: Irrelevant filler details regarding the current weather (which has no impact on the story) - introducing his summer vegetables could haven been omitted, it was already mentioned that he quit his job to become a farmer.
Page 10 and on: The interactions feel forced, artificial and rushed. You can argue that this is subjective or chalk it up to her being "an alien" I don't mind either way. From her perspective she supposedly tells some peasant her actual name (if he knows she's a noble, she can be held for ransom), age, and military information just because he asked. And obviously he questions nothing, and she warms up to him in a matter of 3 panels.
Obvious cliche bath scene, and him barging in - that's as low effort as it gets in terms of tropy and cliche developments. Note that nothing really happens for about 10 pages, and the whole buildup is really to that one scene.
The culmination of the chapter seems to emphasize the self-control of our MC, implying that he's achieving some kind of feat by not raping her.
Chapter 2:
The first few pages are ok.
Then we're fed more of "the MC is a gentleman" in a pretty blatant manner - nothing wrong with that except maybe the boring execution.
Surprisingly she's not in a rush to continue on her journey and convey whatever she was tasked with, but rather leisurely has breakfast and chats with the MC.
It's almost as if she's there only so that there would be a "beautiful exotic young woman" for the MC, because let's be fair - that's the bread and butter of the manga (yes, it is a stupid premise,
the issue here is that it is coupled with unimaginative and poor execution).
I can't really buy the fact that she's like a kid in a candy shop, and we see no worry or rush while she's eating - she's more preoccupied with the chopsticks and itadakimasu than her missions, resulting in no feeling of urgency. Which should be there - the manga is simply logically inconsistent in that regard.
The chapter culminates with... her eating...
Pretty anticlimatic and inconsistent considering what we were presented with in the exposition.
Chapter 3
Suddenly she remembers she has to go to the capital - after about 1 day of entirely ignoring her mission.
She's somehow not bothered going without her armour and weapon to where she was attacked by orcs.
The teleportation scroll is introduced post factum, to somehow explain how she appeared in this world.
She confirms she has been using magic to speak with him, which clearly illustrates that she had no reason to trust him as much as she does in the first place.
Unless you want to argue that somehow in her world people do not ever have disputes with each other, and neighbouring countries all get along extremely well (we're talking about medieval times to boot).
Chapter 4:
Literally a filler, unless you consider the first two pages to be the whole chapter.
I am sure that vegetables are a key plot point, that one cannot get without - basically it's as boring as it gets. I am sure there are better sources to learn about vegetables too.
We also can make a conclusion about what seems to be becoming a recurring theme throughout the manga - about how "amazing" modern society and Japan is. Which to be fair doesn't
add much to the story - it's the same thing over and over - show the heroine something new, watch her reaction, rinse and repeat.
I'll stop here since chapter 5 is a cooking filler chapter, with more of the same, and I simply don't feel like I have to continue on to make my point.
What's more interesting, is that after the author apparently ran out of filler vegetable, cooking, and driving chapters, he went onto full bs chapters.
Starting at chapter 17, we have the epic government arc. If you go back to the comment sections of this arc, then you'll find my comments where I've explained in a lot of details why the government reaction is unrealistic, and why our MC's decision is stupid. The tldr is that basically no country would ever let some new "technology" like magic get out of their grasp - the stakes are
simply too high. And before you go on to argue that they will - do consider human history - where human rights have been trampled over when the stakes were a lot lower.
Other people have also presented various reasons why the chapter was simply unrealistic and inconsistent - the author simply didn't think it through, or didn't have the capacity to do so in the first place.
To sum it up. The author chose a stupid premise, and coupled it with his lack of talent for writing. If you can't go without some logical inconsistency over the span of 20 pages, then there's certainly some kind of issue. An even bigger issue seems to be that he doesn't have any direction, and doesn't really know where he wants the story to go, resulting in a multitude of fillers. And it's not like I expect the author to be Kafka, or write me some GoT or LoTR clone. I just want some consistent writing, but it seems that's too much to ask for. I can name manga that have had more development (and a more consistent and realistic development) in one chapter, than this one has had over 10 chapters. So this is below average even for manga.