I am so sorry for your loss. I loss my Mother at a very young age and inherited a Step Mom. I know how verbal abuse feels.
It sounds like you are from the USA, sorry if I am wrong. Here are a couple other numbers for you:
National Child Abuse Hotline 800-422-4453 National Youth Crisis Hotline 800-448-4663
Please pick up the phone and call someone who may be able to help you and your Dad.
With kindest personal regards, Kitt