I havent started reading but my impression from comments that his personality is similar to bakugo from my hero acedemia
Revenge motivated by what ? The fact that he was beaten up, couldn’t bare it so much that he regressed. “Not motivated by some disire to be the best”?! That’s EXACTLY how he is, he came back to be the best, to have monopole of the title of first, to dominate the game. He DO think he’s better, or else why would he come back ? Why couldn’t he accept defeat before ? Why is he obsessed with Odin ? I feel like you don’t have your fact checked
You are not being objective, nor honest. You can not like him, that’s on you, he got a nasty temper, I will admit. “Lacks character” ? Did you watch mha through reels ? He is someone who will fight for what he stands with his ideal of justice, just as the mc. I believe, cause I know he wants to save people just as much as every other hero, that if he was there, he would have done the exact same thing as the mc in this manwha. He bullied Izuku as a kid, that will never change, but he is growing, bettering himself and he is doing what he can. They have the EXACT, ideology and personality trait of “lawless hero”
I also got a feeling that what happened in the silence is actually huimin's past life, the time returned huimin really had a split personality and the fact he possessed a character from a book is just his delusion and self beliefs