Well, he is the Golden Child and the favorite. No wonder he gets rewarded the most.
He never abused anyone outside relatives (not saying it's fine obviously, just clarifying.) It seems to be a thing that "runs in the family." He isn't mean either with friends or animals. It just seems like when we are in a family setting it becomes a Battle Royale where you survive or die.
I don't know how to explain it better, sorry. I'm kinda like that too. Even though I may have aggression problems I never had a fight with people outside my own relatives. But cousins, father, uncles or my own brother? Yeah, we definitely have beaten each other several times.