Well I looked at some of your older posts and it seems she threatens suicide to manipulate you ect ect she has a lot of anger
Bipolar is just not jumping out at me
They won't say borderline personality because she's under 18 but they will mark her as bipolar on paperwork even if thy don't really think so to get insurance coverage
But no matter what she has I would look into dbt and also look for unorthodox treatments like those teenager nature excursions for those with trouble
What does she connect with? Animals art anything? I think positive feedback goes a long way in troubled kids
There has to be something she can be passionate about that will help her self worth