I work in personality disorder, and it's not psychopathy she has (although I can see why you'd think that with the manipulativeness, lack of regard for other etc.). I'd say it's histrionic personality disorder (see attached - I love this mnemonic) with some narcissistic and emotionally unstable traits.
I've not done any research on her to see if she's ever had treatment for any disorders. She could very well have PTSD, but what is abundantly clear is that the behaviours that perpetuate her problems are personality driven and are the primary need here!!! Big brother was an absolute shit show and should have woken her (or those close to her) how damaging her behaviours are to others as well as herself.
Unfortunately there is no 'cure' for personality disorder, and it takes long term, intense treatment focused on identifying emotions, restructuring thinking, coping skills etc. and practice, practice, practice. I highly doubt she could be arsed and has clearly hopped onto the next big drama in her life