The fact you feel the need to object to a main character being gay or trans or, heaven forbid, a 50-something grandma, just for the sake of it, no point really except they felt like putting it in there - that says a to about you as a person.
Why does this upset you? How are those artistic choices any different than putting a plumber as the main hero, or a 20 something female with a gun that has the ability to open wormholes, or a female archaeologist whose main defining characteristics are their DD sized chest?
Why do these "woke" characteristics upset you and not say, the fountain scene in God of War or the fact that you can be a complete psycho in Postal, or...
My point is, there are a hundred different reasons to be mad at a hundred different artistic choices in video games. How is a gay protagonist in Assassins Creed ruining that game for you?