You parents abused you.
You are a survivor of child abuse.
They may nave experienced dysfunction and abuse themselves but that is not an excuse, most people who are abused do not go on to abuse others (some will, but most understand particularly from those experiences of their own that it's wrong). Sometimes children are naughty, that does not mean you trash their rooms. They should never have dragged you by the hair.
You can have parents who are abusive while not neglecting your basic needs and while also giving you nice things. They can have some positive traits while still being abusive. Abusers are not pantomime villains or unkind all the time, but when they are unkind that are very cruel.
I used to be told I was a spoiled and difficult child, and I thought I had a normal upbringing. I used to be sad and angry at times growing up but not know why. I felt awful about it as I had such nice things and I got taken on holidays, and my mum helped me with school. I tried hard to be grateful.
I now realise my father was abusive towards me and the rest of my family, and that was why I felt that way. He used to throw my things around and put my possessions into dustbin sacks while I cried if I displeased him, among other things.
I ended up with a non-molestation order against him and no contact as an adult.
This only seems normal and they only seem okay because this is all you know. It's likely weighing on you because your childhood has left wounds. Thinking about this a lot and struggling to sleep suggests to me you found it very traumatic. I used to list symptoms like this and think it wasn't right but not think it could be anything like PTSD as I didn't see my childhood as that bad (I hadn't been in a war or anything)...only when I spoke to other people about it and saw a proper counsellor did I begin to realise, it was that bad, and I did have symptoms of PTSD.
I strongly encourage you to consider finding a counsellor to talk things through, with one experienced with abuse. It's hard to come to terms with as it is a rewriting of the story you have always known and been told...it re-frames everything once you accept you were not the problem, but were abused and didn't have a lovely life. It allows you to acknowledge your true feelings and needs, but there is a lot of grief that goes with it.
I think you are still in denial right now and trying to minimise, because it's scary to see the truth of it and accept your parents are not what they told you or you wanted to believe. It might change how you feel about them as well as yourself. The denial is how you dealt with it as a child, when you were unable to get away, and it's likely part of what allows you to maintain a relationship now.
I hope you get the support you need and deserve to move forward. There are dedicated forums for survivors of child abuse which might help if a counsellor still feels a massive step.