A protagonist doesn't' have to be sympathetic.? But she has to be interesting.? ?The character has to draw you into her world, her wild and crazy pov.??I? suggest that the character in this story be described for what she is, that your logline be an invitation for a script reader to go on a journey into a heart of darkness of a psychopath.
My first response was to try to normalize the story -- hence, I tilted toward reworking it from the victim's point of view.? But if you? are intent on telling? with her as the protagonist, then I think any attempt to normalize the story would only dilute the character.? ?What made "America Psycho" so? compelling is that? the story is told entirely from the pov of the psycho.? We enter his mind, his custom styled insane asylum.
fwiw