“I decided to be a jerk to another person in a game because there are no consequences to me doing so IRL lol lol lol ytheymad?”
Yeah, you’re just being a jerk, of course people are going to be mad. You even said you were doing so intentionally to show your dominance over him.
Focus less on ‘how good a player’ you are, and focus more on improving how good a person you are.