It spoiled the experience for me too. I'd read a yaoi novel if I needed gays in my soup.
Ace is bisexual, not gay. He's got something hinted going on with another LI, and he can fall in love with the MC. Bisexual.
As long as he puts his d in men, he's out of my dating pool hence a gay for me. I wrote it like that fully aware of what I'm doing.
You just... erased bisexuality? Wow.