I think you're a bit harsh. I have friends who knew Patty before she was kidapped (as well as that Weed idiot boyfriend), and she was a nice, vapid, typical upper-class girl, conventional enough, but no real strength of character. That I fault her parents for, but her Dad is a jerk and her mother always had elbow trouble, it's said.
Patty didn't ask to be kidnapped and repeatedly raped, and I can imagine someone as weak as she was being eager to please her captors just to change her circumstances. Unless you've been through something like that, I don't think you've got much right to criticize her.