That is my greatest critic (besides not properly telling/showing important information). The MC, going by chapter 1, has lived in this world since 15 years, seems to know about the organization at least since some time and how their ideals are in stark contrast with the world right now. The result: Enemy angry at him -> surprised pikachu face
He also acts weirdly distant around Kushina, his supposed childhood friend, who helped him deal with his Umbra (hugging each other) since long before, or at least we don't get the sense of closeness that is implied.
he's just fully detached from this world.
He still thinks of it in terms of the media he remembers from his original world, and not the living, breathing, functioning reality he now exists within. And as you said, he's apparently kept up this shtick for
fifteen years, while being viewed, and treated, with contempt and as scum, by women at large for being a man.
He's got a childhood friend, but he seems to see her as a character in a video game or novel, and still fanboys over the "protagonists", but somehow ends up as part of the faction that said protagonists want to destroy and dismantle.
And even if said childhood friend was able to "shield" the MC from the brunt of the systemic misogyny, the fact that he just doesn't treat it as real or a big deal breaks the immersion of his having existed here for so long.
At
some point he should start feeling the weight of that, and his carefree attitude about
everything we've seen thus far doesn't make me want to care about him or his story here in the slightest.
He's treating the whole thing like he's some sort of voyeur and doesn't see any of them as real people, apparently - to the point that with his life in real danger at present, he's
suddenly aware of the fact that this girl wants to murder him.
And I don't think it's just because she's a misandrist lesbian. I'm sure the author's going to force it that direction for the sake of meeting the trope quota, but
realistically, a person who can control swords and fling them through the air,
is going to use them to kill people who are seen as the definition of "enemy combatants of the state".
The story just wants to be two things at the same time - dumb Isekai MC who wants to treat his new reality like a TV show, and a real world with an ongoing serious conflict with incompatible ideologies and the zealotry of their adherents who are willing to do anything to achieve their goals.