He didn't hate her, he was just weirdly obsessed with her and wanted to possess her and ruin her life. For some twisted reason that made sense in his head. He also thought he can take revenge on her for getting him into prison and establish superior hierarchy over her by tormenting her and making her go thru all that. It was just him being psychopathic and bring obsessed over her and calling it love

I never understood why he hated her so much?