You're not the only one who had the same thought. Damien was originally meant to fill the role of the "Normal" guy route opposing Kate's "Normal" girl route, but eventually things changed with him so there was a vacuum left with the male choices.
That's why in 0.50 we added Nathan as a route and character to fill that role. He's doesn't have as much content as the other routes, but his involvement and character more than make up for it I think.
So TLDR: We have one! He's just a bit difficult to get on his route.
I was thinking more of a "that guy every girl in school has a crush on" sort of guy. The popular, nice, cute, sexy and wholly unattainable girl of every weeb's dreams, only its a boy, and the weeb dreaming is a girl.
But I'm done yapping here. Again thanks so much for the game, I'm really enjoying it! And sorry for being so picky and judgy when you're putting this whole thing out for free. Will check out your patreon