Please help me with this anger issue?

I am so angry... My sons father doesn't help me raise my son at all. He has 2 cars and a 3 bedroom house that he lives in alone. He always says he can't help me cuz he has his own bills but I feel like he can get a smaller house if he's not even using all those room so that he can help support his son. I know this is a common complaint now a days and I don't want to complain I need a solution. I guess I'm angry because I feel dependent for his support and I feel helpless. I work and every penny goes to my son but he goes out and lives a single life. I'm working and saving trying to become completely independent of him so I don't have to worry about his non support. But I get angry that he comes around and just puts me down to make himself feel better about not being around. He tells my son I keep him away from him which is a lie. I hold this anger in til my son goes to sleep and then I cry. I don't want child support advice cuz I already filed with no results. I need anger management advice. Thanks.