Hello.
I understand your point of view and I have no problem with gays relationship in any game (or real life), although in this game will dificult for the story specially (sorry for you, seriously). But it could be included outside of the main character, for example a noble gay that carries his sexual preferences covert by the taboo in middle age… even so I don’t think that’s important for the game, same that hetero relationships
There is a saying “not ascribe to malice what can be explained by stupidity” (in this case I refer that “not ascribe to homophobia what can be explained by liking”). Many people don’t bother to moderate their language when speaking about homosexual relationships and gay people can bother for the rudeness. But I’m sure most of them aren’t as opposed as you think they are. You should understand that some/many hetero would see the gay sexual things like a very fat woman with thong marking her meats, something unpleasant to them (it’s an example) but this don’t mean that they are retrograde, just about what everyone likes and what not and any option is respectable.
I understand that you’re bored of heterosexual relationships but that’s the world where we live, the normal things are established by majority. The tyranny of the majority
Regards