What?! Oh dear. I'm so sorry. Does she have a supervisor? Is she referring you to anyone else or any other clinics who can help more?
The thing is, sometimes things get worse before they get better. Plus, improvement sometimes is not going backwards. To say you are too symptomatic for her, ok yeah, she is clearly out of her depth of she doesn't know dissociation can often take years to resolve, so maybe it makes sense to find someone more qualified - but not to just dump your care entirely. Having any symptoms incubates a need for treatment, not no need for any treatment.
Grr. It took a long time before my dissociation improved. I'm so sorry this happened to you. :hug:
I would suggest going or at least contacting her in some format and asking for referrals. She is ethically, professionally (and in some states she is legally) required to provide them if she is stopping treatment for a reason other than no longer having symptoms.
Her quitting is not a sign of YOU failing, but her being outside of what she is skilled to do. For example, some therapists are great at OCD, some are not. some are good at single even trauma; some are not as good and are better at chronic trauma and dissociation.
There are times too where people need different forms of therapy through different seasons of recovery...
Please don't take this as you failing, but that you are graduating past where she can go with you.
And I know that doesn't make the shocking sense of loss and betrayal of trust in her being there for you any less painful. I'm so sorry. :hug: