I'm inclined to disagree. The only person left who is actually helping her is her grandma. Sure, her mom pops by from time to time to take her little turdburger shopping for snacks, but she didn't do jack shit about Mike, the self-harm, et cetera. Grandma did. If Grandma kicked her out for good, once and for all, Julie would just go "FUCK GRANDMA I HOPE SHE DIES" and spiral further. I feel like she'd end up in a homeless shelter before trying to improve herself, and by then I doubt she'd be capable of even starting to take care of herself. Unless you consider a group home for mentally challenged people to be "progress" or beneficial, I don't think she's got far to go alone.
On the other hand, if her mom and dad actually stepped in and said "Julie, we are worried about you," then I think she'd take a look at herself. She clearly values them a lot, and as shown in that sad video from Christmas one year, they have ignored her since she was a young child begging for their affection. Maybe getting that affection at long last would be her wake-up call.