My W's parents are D so she has been through this before, and she did not have a good childhood. Her father was physically abusive and her mother was verbally abusive. They were not completely dysfunctional but, she never gave me the impression it was a very happy family life. My family life growing up on the other hand was the polar opposite...parents have been together for 55 years.
I wonder of this large disparity in family types, or maybe even family values, has anything to do with where we are today, hard to say.