I am feeling mad towards how my family is treating me.
Why are you mad at your family?
My brother is a real idiot and he had taken my car keys and drove away.
Your brother was in the wrong but it's not healthy for you to hold on to that anger. You should forgive him and move on.
Bullshit. You think I should have to move on like nothing happened? I'm going to keep this anger and make him regret everything.
Your brother shouldn't take things without asking but it would  be best if you calmed down first before bringing it up with him. You should tell him to ask next time and then hide your car keys so he can't borrow it without asking.