When he got sober no one seemed to care. While he got clean everyone drank and ignored him. Back when he was drinking he would ignore everyone because most seemed to have a problem with his drinking. He never pressured or told anyone anything others seemed to give him ****.
He moved on since he was tired of being excluded and held to some ridiculous standards that had nothing to do with him. Being quiet and observant so many people would cut corners or try to pull a fast one. His mind clear way sharp compared to before.