Don't really see what the issue is when you fuck half the world yourself. I guess its just okay when our self-insert is a man-whore in a world that runs on sex.
You can choose to not have sex with everyone you see, y'know. Even disregarding that, it gets annoying seeing/hearing about characters fucking each other after a certain point if you're not into that. Just make it happen off-screen and be somewhat tasteful about it. Hearing Quin go on about wanting to fuck every companion just because you ask his opinion on them is incel behavior, honestly.
If you want characters to sleep around, handle it like they did in the previous games. It's stated that they fuck other people, and not much spotlight is given to it after that. They may have a scene or few fucking other people, but you can mostly just ignore it. It's way harder to do that in this game. Whether it's just unwillingly watching your companions get fucked after a loss, hearing about how characters wanna fuck each other, or just characters very obviously have a preference for another one rather than the PC, it's much harder to avoid in this game.
I'm not totally averse to character on character action, but it's not handled very well here at all. Especially because it's a game that doesn't market itself as having a focus on that.