I just don't understand.

After almost 10 months of fighting and arguing, why does my soon to be ex husband want to fight STILL?? The divorce is to be final next week, yet he still tries to latch in and bring me down. What is the purpose? All this fighting now...why? Because I switched the electricity over into my own name. What is the big fuckin deal? Apparently, I screwed him over. I don't understand..maybe I am not meant to? So now, he takes it out on our children by refusing to visit them this weekend...not just ANY weekend..but our sons birthday weekend. Our son was thrilled to see his daddy this weekend. Now what? He flakes out on them once again. Again..and again...time after time. My children do not deserve this life! He is so inconsistent and unstable...they deserve the best. I WILL give them the best!!!