Alison and Ian is a solid B+ relationship (to me). A good amount of compatibility, some natural passion, no major conflicts or worldview disparities (unless you choose/make them). But the spark that Ian and Lena have is missing. And as you point out, non-asshole Ian is the only decent male option in the game. Perry could be, for someone with the right puzzle piece match, and Wade might be again, if he rebuilds himself. Everyone else is deeply flawed in ways that make them bad people, or at least bad people to date.
I do wonder if it's a failing on the writers part, for not being able to create compelling male love interests, or if the bar is so low for what makes an acceptable male romance option that they think these are good enough. Because it doesn't really feel like it's just an issue with this game or EK, but across media types. Romance, from what I understand, is broad enough to have decent and compelling options as well as the fucked up dysfunctional male love interests, but elsewhere it seems like 90% crap vs. 10% a healthy and interesting person you would recommend to a friend to date.
Also, Jeremy is just the worse, but then Axel exists, so not the absolute worst.