When a Jerkface has lost control of you (e.g., when you leave), s/he is all about getting that control back. That means Jerkfaces will say or do pretty much anything to get you back in their clutches - including pretending to understand your pain, promising never to hurt you again, even volunteering to go to therapy.
No one else has to like it or understand it.
When you're being treated badly, you get to do what you want, the way you want it, in order to get your life back. No one needs to like or understand anything you do.