I can relate to your anger. This morning I was thinking about my W and the issues she has from her parents. Her mother resented the hell out of my W, and still does to a certain degree. Guess what, W is doing it to our S. I mean resentment to the point where she told me that she hoped S4 and I, who were going somewhere in the car, would get into an accident (not the only time she wished something would happen to me). Her parent divorced. She hasn't forgiven her parents for it, she sees her mother is not happily married (some question as to whether she left W's father for her current husband). It's unreal how W justifies passing along all the issues that she's gone through. This is where I see major MLC - when a parent can justify destroying the lives of their children for their selfish illusory desires in the name of happiness or personal fulfillment. Sad, very sad.
W has no real impulse control, and has often sparked S to say things like "you guys love each other" or "stop fighting" or "we're family." A four year old shouldn't have to think about trying to keep his family together. He shouldn't feel like that. Nothing I do can stop W from lashing out if she feels like it. Even physically. It's really distressing.
“No problem can be solved from the same level of consciousness that created it. ” – Albert Einstein