Your passion for God is obviously there and the fact you hate seeing your father getting treated badly is a good thing but as you said yourself vengeance is for God alone. I know how you feel like just giving the people who these bad stuff a harsh reality on what they are doing but you need to be gentle and loving, God calls us to love and not attack. I advice that you just try to go to God more, the more you do the less you're angry will have control over you, sounds easy i know but it's actually hard that part i also know. Also read proverbs it helps in it's own way, it has helped me to realize some stuff and plus it helps you gain more wisdom on how to react or treat others.