I have an idea for a story where this man goes to another dimension using his powers since his home dimension hates him because of his powers. The first and only dimension he goes to is really nice to him and he stays there, as the version of him from that dimension died and the "friends" he had in his home dimension are nice in the new dimension. Anyway, I got a question: how should I make his home universe seem mean to him when I'm gonna start off the story with him leaving for a new one?
Well, there are a lot of ways that you can show the way he’s been treated, either directly or indirectly! You directly show them calling him names, treating him differently, being physically or verbally aggressive, et cetera, just before he goes, show this in a flashback, or even just have him reflect on that past as he leaves, hoping to leave that all behind him!