Distrust, communications problems, lying, manipulation of one partner by the other. 
I believe that upbringing plays a significant part in family problems, I have seen situations where a child has been spoiled rotten, always getting its own way. Later the child disrespects its parents. It's like growing a tomato plant ~ as it grows, it needs to be trained against a stick (no, I'm not advocating corporal punishment!) it then grows tall and straight. If it is not trained, later when you try to straighten it, it will break.