Or rather, I hate what he represents.
Izuku is a victim of an unjust system, who believes that if he works really hard, and refuses to give in, he can prove that he deserves to be treated like a normal person.
He also believes that other unfortunates should do the same: work hard, and prove to those that harm them that they should be given the chance at being treated like they are normal people.
Izuku supports a system that does not hold accountable the abusers. He may look down on those who mistreat others, but his response is to look at the victims and say "prove your abusers wrong by working hard". He proved himself in the system, and was given a chance. Yes it's completely messed up, has a super high price, and he struggles far more than others to maintain the same position, but he got given his chance. And he expects others to prove their way to being given a chance too.
I don't know why Izuku sees the victims as the ones responsible for changing their lives and not the ones in charge. But I hate that he holds himself as a symbol of "you too can earn being treated like a normal person" and thinks that's ok.
Izuku deserves better than believing that his worth is entirely centered only on what he offers others. And others like him who don't have his luck deserve better than being told that they just need to work hard enough to prove their abusers wrong