Perhaps the thought of trying to become a good/better dad when it's your turn might help reduce the anger? I don't know you (or how old you are) but thinking how you would bring up your kid (if that is what you'd like some day) could help you right now. I had a talk once with a friend in the same situation and he found even just saving some money for his future kid made him feel like he was already being a good father. Just a thought...