It's a self-sustaining cycle. Breaking it can be very difficult, and it's going to take a lot of effort on her part, which she may not be ready to accept. I think the best you can do is stay her friend and be ready to support her when she needs it. Baby steps help sometimes.

Yeah sorry to say this, but she is one of those worthless ones. She could look like Ms. Universe and still think she looks like a troll. Don't waste your time on her. She is going down, the only question that remains is whether you will be dragged down with her.

I know this sounds harsh as fuck, but I'm speaking from personal experience. I once had a girlfriend that was like that. A total babe. And I loved the bitch, so I didn't leave her. Spent years trying to help and fix her, and wound up losing myself in the process. It was then that I realized that she is consumed by her self hating negativity. Her life is absolutely brimming with it and it affects everyone around her. I didn't need that shit and so I fucked her off and left. Guess what... it's been over a decade and she is doing just fine. Still exactly the same, still making some poor cunt miserable, but very much alive and thriving.

I guess you can ask her definition of unattractiveness. Also perhaps her parents were judgemental.