I have been re-watching the show and since the first time I saw it, I was extremely biased with WW I wanted to be as pragmatic as possible and try to understand the other characters points of views especially towards Walter and his behaviour. I had a good chance to really take off my WW glasses and see but no matter how, I end up sympathising with him again. For example mid way season 3 when Jesse wanted to cook alone in the RV and Hank was watching him on the clock, Walter got him out of trouble. Jesse got beat by Hank, where was Walter at fault there? He really stood for him (for both of them) but Jesse was really upset and wanted nothing to do with Walt again. Walter brings him back in and gives him a cut of the Gustavo money, what happens then? He wants revenge on Combo and while he was going to get himself shot by two drug dealers, it was again Walter that saved his life.
That is the turning point though which made Gustavo against Walter, I will continue season 4 as I have been watching but I am really failing not to sympathise with WW.
Then about Skyler, well I could go on forever, I understand her fear and her stand point but in the end she is just being stubborn and refusing to trust her husband.