It must be tough for both of you. Since I'm not a parent its difficult for me to imagine how your dad feels but I can sympathise with how you feel. Have you tried sitting down and talking with him on his own? It might be that he doesnt realise he is doing it. He needs to be aware and leaving things as they are might cause problems with regret later on.
Everyone has a guardian angel. They help pick you up when you fall, comfort you through your times of need and help you appreciate the times when things are going well.
"A gold medal is a wonderful thing. But if your not enough without it, you will never be enough with it." - Irvine Blitzer (John Candy) in Cool Runnings
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