However, there's something about it that makes it entertaining enough to keep watching. Among the half dozen isekai series I watched, this was far from the most repellent, despite its unequivocally bad politics and horribly unlikable protagonist.
The show's craft is much better than a lot of other popular isekai series. Despite the main antagonist primarily being a shallow caricature of an evil conniving Stacy that torments the incel hero for fun, she and the other female characters still feel like they have actual personalities, especially when compared to, say, TensuRa, where the women are just walking pairs of tits for the protagonist to enjoy.
The subplots are interesting and have some amount of tension, even while we know the protagonist is the typical isekai power fantasy of a loser otaku turned invincible bad ass. It feels like there are actual stakes to the action, which is where a lot of other isekai (e.g. SAO) fail.
You find yourself rooting for Naofumi a bit, even while you realize he's a vengeful prick who helps others only as a way to get back at the people who wronged him. You want him to become a better person, even if you realize the world of the story is completely contrived to make it seem like he has no choice but to be a slave owning scumbag.
This is the rare show that I enjoyed and will most likely continue watching but have no earthly idea why I enjoyed it or why I want to see more. However, it's definitely no masterpiece, so again, if you're put off by the truly awful politics of the show, you're not missing much.
