harem are cool if done well. just don't make the MC the type that act's more like a coward and servant then a confident cool headed man around women. also the fact that most of his class doesn't see him as a human being is messed up so the MC shouldn't try to win them over or even care about their well being. when someone treats you badly when your at your lowest, you shouldn't care about those people when you rise above them.
Shinkaio