I'm gonna be honest, from what I've played, it honestly seems like the people complaining about the party members hitting on them too much have just been clicking options without fully reading them. It kinda sounds like the writer here inadvertently started romances with every single party member.

Yes, if you get their opinion of you up high enough, they will open up the possibility of romance- but you can tell them that you're not interested in them in that way, and the topic will never be brought up again. And yeah, the game is considerably more sexual than a lot of other RPGs. I don't think there's any denying that. But the author does make a good point in that it disrupts the usual structure of sex in video games. To me at least, in a way, sex in BG3 feels like it's part of the world; rather than something that just exists for some late-game cutscenes.