Yes emphatically so.
Very dysfunctional upbringing
Father was an abusive alcoholic - of all the siblings I had the least relationship with him and I'm now permanently NC
Our upbringing belongs in Stately Homes and the complexities of it bred dysfunction between the siblings.
I'd say I have more insight into the real problems between the siblings as I've been more affected by that than by my "Dad"
My relationship with one sibling is very poor and much poorer than I think they realise because they have little insight into the very permanent damage they've done by inflicting punishment upon me for their own frustrations over things that aren't my fault
I am very low contact with them and would go no contact but I refuse to miss family occasions because of them
My preferred outcome would be to have a conversation whereby we good humouredly agree that our dislike of each other is as mutual as it is intense and we keep up a facade until the older generation dies and then never have any obligation to each other ever again. This won't happen, so I will quietly reduce contact to nil after the deaths of our DM and aunts.
It is very sad, not having a father has really affected me psychologically, but most of the internalised unresolved anger that I have is related to the horrific second class citizen treatment I get from my sibling and can't challenge because the row and the knowing she has hurt you is what she actively wants, and gets a physical buzz from like a drug
So I have to grey rock technique but have nowhere to put the feelings.
My DM exacerbates it, mostly unintentionally,though it was definitely intentional growing up because she would play us off against each other to make her parenting easier
Does my utter hatred for my sibling make me feel good about myself ? No.
But you reap what you sow.
In a nutshell OP @MorningCuppa yes I know exactly what that's like. You have my sympathy.