Sometimes as an adult you have to decide "this is the last time these people are gonna make me feel this way" and stand on it. Be it family, a relationship or a friendship.
He is not the loser. He is the man who fed the house with his limited funds while they laughed at his losses through a cloned screen. He is the man who begged for an explanation and got a police call-out instead of an apology.
This is what violation feels like when the person who steals your life sleeps under the same roof, eats the food you bought, and the company you pay every month decides that your pain is not their problem.