As a queer female, people like you do nothing but make our community look bad. All he did was give a general content warning for people who didn't see those tags. He is not a misogynist, or 'invading women's spaces', he gave a general heads up for fellow queer people. The game is not openly marketed as an 'otome' game, it is called a 'dating sim' and a 'visual novel'. This is literally said on the title screen of the game. Nowhere in the description is it said that the MC is a female. The only way you would know this is if you went to the 'more information' part of the page and read it.
I am also used to women being talked over and shit on in gaming spaces, but he wasn't doing that. You do not speak for all women. You made a mountain out of a molehill and hurt your own cause. Men look at people like you and use it to justify their own prejudice against women in the gaming community. Take away all the talk about trans people and gender identity and go back to the beginning. You saw someone give a general warning about the pronouns in a fictional dating sim, and decided that was what you were going to get angry at. You were going to stick it to this random commenter who did nothing other than use the word 'warning' in a place you didn't like, and you saw that as offensive. That is the most pathetic thing that I have seen in a long time.