@Appleblossom wow! With your parents' upbringing and then your own it's a credit to you that you are a functioning hooman bean!
I love how your mum still wanted to help you learn the piano, that is just beautiful.
It sounds like their mental health issues were definitely caused by trauma which is just so sad.
My dad was obnoxious, he was my grandmothers' favourite child because he was the product of a relationship with the man she truly loved, my grandfather who died on the HMAS Sydney II. They were expecting to get married when he returned from the war but instead my grandmother was left single and pregnant in the 40's. She considered ending her life but fortunately didn't.
When dad was still very young my grandmother married his stepfather and they had 4 children together. Dad was always put on a pedestal though as she married my step-grandfather out of gratitude, not love. When he joined the army he was encouraged to train as an officer so went to the officer cadet school Portsea. Being an officer brought with it privileges as well so he settled in to being a self involved, selfish person, which he remained until the day he died.
He was abusive to his kids, he physically abused my brother and mentally abused me as an adult and for quite some time I refused to speak to him. I actually changed my surname in 2005 to my maternal grandmothers' maiden name because I didn't want anything to do with him.
We did reconnect a few years later and he still referred to me by my old surname until I gathered the courage to tell him I'd changed my surname. He said he didn't care but his evil b*** of a wife would egg him on and say how terrible I am to have done such a thing. She was the reason we didn't speak for many years. He finally accepted my new surname and all was fine. Then my half sister aka Narcissister stirred the pot when dad updated his will and I got an email from dad saying "oh by the way, I used your old surname in my will, hope that's not a problem." Dad sure could hold a grudge, especially when he had a toxic adult child urging him to do so.
Both dad and half sister knew it would create more work when it came to dispersing my inheritance so I had to show proof of my name change along with several other documents, something his 3 other kids didn't have to do. He was vindictive until the end, telling me that if I am going to be negative about my half sister then I could just F*** OFF (in capitals) and not speak to him. I had questioned something half sister had done and he went off his nut.
Anyway, he's dead now and I don't have to deal with his BS, nor do I have to have anything to do with my half sister. She is another type of evil. I pray God will replace her heart of stone with a heart of flesh each night, maybe one day she might reach out and apologise for her behaviour but I won't hold my breath!!