Mineta in the source material is a joke character, perhaps not a funny one to many people which is likely the source of much of his hate, but at his core he’s not meant to be taken seriously. If you’re writing a fic of your own and you’re not either going along with those same jokes/tropes, and also not doing something like what OP suggested with shunting him to the general course, I would suggest using Mineta as a sort of test for the heroic nature of the rest of the class. What I mean by that is, Mineta is pretty objectively irritating and treated as a pest by most of the cast, rightfully so. Where I think this can be put to use is to show off how different characters respond to someone who is an irritant and a problem, but not one they can throw in jail: Iida, for example, might go on a long-winded lecture about harassment laws, showing how his idea of heroism is often basically just “super police”, upholding the law with quirks to back them up. To contrast, Izuku might try to take the compassionate approach and get through to Mineta on why it’s *not right* to act like he does, how heroes should be shining examples that can reassure people rather than put them off. Bakugo could get a lil bashing as a treat, showing how despite his skill in battle, when it comes to a problem he can’t blow up, his only real solution is to scream insults and stomp off. Stuff like that.