He was tired of arguing he didn't want to empower negative people feed their egos. They talked and ran their mouth as he walked away because they'd never own up and would blame him. He took responsibility for his actions and said sorry but never forgiven he changed by not repeating those actions.
He didn't like the burden of the world on his back he couldn't hold it or carry it anymore feeling crushed not able to breathe. He loved people didn't expect anyone to change expected them flaw and all. While anything he did would annoy and irritate everyone such a huge causing so much pain causing him to go numb and shut down. He hated that feeling just to be liked and accepted.
He wanted to be himself but couldn't because it felt like such a rip off and being cheated his living life to fullest ever since his brother passed away.