i'm BPD too and i have an amazing therapist even having some silly staff but its ok and your therapist didnt damp u like this but as aresult of disease and may be the time now to search for new one who really can and accept treating BPD as its along journy for both pt and therapist .so,you should not fight it alone as its really difficult and may be impossible for any one to deal with it alone ,and if your previos T accepted to be incontact with him it will be agood resorce of support plus a2nd openion and advicer till you will get trust and relation with new T .
take care of your self