Get out of the house and go take care of you
maybe you should move out
Maybe if your brother put more responsibility toward his own car payments and college, your dad can focus on his own life more and not be so stressed.
Your dad truly does sound like a lunatic. My advice is to get away from him and out on your own as soon as possible. We become what we are around and you don't want to be like him. Hang in there. I'm sorry it's rough.
5 years in college?