Come on ffs, what is with japan and their obsession with minors, imagine a western movie about a college student who is attracted to a middle schooler, that thing would get banned everywhere, and before anyone says “bbbbbbut its just a drawing she doesn’t exist” these type of things are just wrong, even if its in a manga, the fact that there are people who would defend these kinds of things is truly sickening, if you are like 19 or 20 you shouldn’t be attracted to a 10 year old, sad that it turns out this way cause the premise was interesting.
You can acknowledge something is wrong without boycotting a work of fiction for including it. A Song of Ice and Fire contains countless examples of grown men marrying pubescent girls, but people are entirely capable of suspending their disbelief and withholding their moral outrage because they understand it's a fictitious setting that has nothing to do with the real world. I just happen to be willing to extend the same sentiment to otaku media like anime, manga, and light novels.
And if you're not willing to extend that sentiment, that's perfectly okay as well. There's an incredibly simple solution to your problem: don't consume that media.
Another thing to consider: this isn't just a work of fiction, but a comic-- real people aren't even being used as representatives of characters. The characters are entirely fictional, the characteristics thereof basically arbitrary. Accordingly, it's easy to pick and choose the aspects of the narrative/characters you want to latch on to in order to justify your liking of the work. It's reasonable to not take that approach, too, viewing it more conventionally.
For example, my affinity for the "yandere" archetype isn't me literally wanting to have my autonomy transgressed upon to the point of being a rape victim, but with my dire yearning for intersexual intimacy the dizzyingly spectacular energy of their distorted affection. Some authors using this archetype have even made plain the hidden-in-plain-sight selfishness of the yandere, or even the selfishness of one who would fully embrace such a person.
I find the statement "these types of things are just wrong" in response to a comic that involves no real identities, especially absent any specific moral or ethical system, to just be a personal expression of disgust (and the comment about "Japan's obsession with minors" is just showing their age if they actually think that). There are plenty of other things that occur in comics that would be reprehensible if they were committed in real life (and there'll be other reprehensible things depicted in this comic, apparently), but we readily recognize to not take those things too seriously.
Binge read the LN as far as it's been translated. If this story doesn't end up as a herem end, the JC flat out deserves to win.
She's thirsty as hell, but god damn she took the hand she was dealt and fucking LOCKED IN before the other girls even figured out there was a game afoot.
The occurrence you're illustrating isn't the product of hypocrisy, for the record-- especially since manga readers online are increasingly eager to make "FBI OPEN UP" jokes and point out anything resembling pedophilia in manga narratives.
Rather, you're talking about two entirely different kinds of people. Those ones of former category hate both the former and latter premise, and those ones of the latter category actively like the latter premise while being apathetic-at-worst to the former premise.