She sounds like she's just scared to succeed at ANYTHING. Beyond pure laziness, what else explains the self-sabotage, when she's so close to the finish line? I'll take a guess. Success means people will have expectations now. She can't have that. It also means that the charitable few that hoped she would succeed would have actually gotten something they asked for in this situation. She's not cool with that either.
Amberlynn does what Amberlynn wants, and don't you fuckers forget it! As long as she keeps her personal bar so low, nobody can expect more from her, and that's just how she prefers it. This gorl doesn't want to get better. That's too much work! Plus, she makes tons of money doing nothing, so what's the point? Effort is for losers that haven't figured out the shortcuts to success (Step 01: be an absolute trainwreck of a human being, and people will pay just to see what you do next!)
Pillow Mountain is kind of the perfect metaphor for Amberlynn's life. It's never made. It just accumulates more dirt and grime, and she doesn't care because it's still comfortable. The moment it becomes uncomfortable, she just buys more pillows. It's like putting a band-aid on a festering open wound.
She's living on borrowed time, and this madness will literally be the death of her. Doesn't she want to know how good it feels to finish something besides a plate? Like, believe it or not, it can feel really good to commit to something and see it through. By quitting now, she's just reinforcing the belief in her brain that she's incapable.