Why does my "father" treat his wife better?

It sounds as though he is very co-dependent on her as he is with his drugs of choice. Please remember that addiction can be very controlling and your father may be feeling out of control a lot of the time, which is why he depends on her to make decisions for him. When you're dealing with an addict of any kind, they are not the same person they would be without the drugs. They don't see how their decisions are affecting those around them. I understand you wanting to get mad at your father but he's not sober and in a healthy mind frame. I'm not saying what he is doing is right....until he gets help, it probably won't be any other way. All you can do is control the way you react and until you understand that he is co-dependent on drugs and his wife, then you will constantly be angry.