What kind of a father/husband is he? And what can I do about my situation (pretty long)?

Two ways of looking at the situation.Would your mum still be married to your dad if children were not involved.I don't think so.I think that she is terrified of him and is only sticking with him while children are at home.I had a step dad very similar to your dad.I moved out,got married and never spoke to him again.Do I regret it?No.I never even went to his funeral.I think all of your dads problems go right back to his childhood and what he is doing he thinks it is the norm.You do what you want to do.I just hope your mum sees sense and gets out as soon as she can.You both deserve better.Good luck