Basically make him your bitch.
Constantly insult him and attack him. Don't apologize fucking ever. Figure out who you are. If you don't, you can't become a boss. Become even greater than him
You must be the master of your own kingdom when you enter a game of competitive. You have to take full responsibility for everything that you do. You gotta know what you're getting into -- love the game -- because you're in it m8.
Own the game, accept the rules, and move on into the rules