My parents split when I was 12 and had a bitter divorce. My mom got custody and so for the rest of my teen years I got to hear about how evil my dad was, it didn't help that he moved halfway across the country shortly thereafter. When my parents were together I didn't have much of a relationship with him, so you can imagine the kind of relationship I had with him afterwards, especially when my mother took any effort on my or my sister's part to want contact with him as a personal affront to her.
So skip forward to after I got married, my dad came out to visit his new wife's family who live in the same place I do and he stopped by to see me and my wife. I hadn't seen him or even really talked to him in 8 or so years. Needless to say, it was quite awkward. I kind of had lost that "this is my dad" feeling for him and that really made me sad. I've only called him a couple of times since then and I haven't talked to him in about two years. I hate it and I feel like my father has been taken away from me.
The witnesses had a stranglehold on my mom and I attribute what happened to her attitudes which were shaped by her witness instruction. I think its the reason my father left, he couldn't deal with the way she treated him anymore. I don't blame him for doing it, but I still love my mother and see her often, but not having a Father is a hole I have in my life that I feel will never be fully filled.
So I hear what you are saying about your family, its sad and depressing, the only thing that helps me to move on is knowing that I will have a child someday and I will be there for him or her. I want to focus my life on giving my child a good family and a normal family, something I never really had.