That's the point of her hero arc though. She's broken, tries to self-medicate, shut herself away by being a dick but ultimately knows what she needs to do to move past the trauma is be a hero. It's a pretty human arc, all the self-destructive stuff. Most people know what they need to do to get past their problems they just never actually do it. For reasons.
Similarly, Kilgrave's arc is unquestionably human. Get what you want for too long and you don't appreciate anything. It's the fact that JJ resists his mind control that drives him into an obsession with getting her back. First by trying to employ tactics RL abusive partners do (cut you off from friends, make you feel you're the problem, break down your strengths etc.) to lure back their mates. Then trying to negotiate with 'gifts' and pretend like all will be forgiven. Then finally he just goes full tilt comic book villain and snaps.
I was honestly shocked how brutal Kilgrave came off compared to Fisk. While Fisk dominates by his sheer size / brutality, the callous nature by which Kilgrave toyed with people is on a whole different level of brutal. It was beautiful as it was terrifying.