1. He's so angry. He get's angry at me for the randomest things
2. He's an egomaniac. Think about others for once will you?
3. He slouches, Sit up straight and get your feet off the desk
4. Stop trying to get me to fight you, I'm not your rival. Why can't we have friendly competition instead as friends?
5. Get over yourself and be nice to Midoriya. You're in high school not 5th grade.