Off the top of my head, I’d say it makes little sense that his former associates, knowing how dangerous he is, just sort of generally harass him until they get slaughtered. Then he actually kills one of them with that “pushing the nose into the brain” move we thought was a thing as kids.
His son’s bullying angle feels very cookie cutter, like it was lifted from a Spider-man comic book. Just my opinion obviously. I thought a lot of the characters, dialogue and situations felt like recycled cliches.