Maybe you just reached the end of this person's ability to help you. For her to make such a simple mistake tells me she knows she cant give you what you two agreed on. That's why quitting her seemed like such an obvious solution. It was the end of the line. But two years of talking with an MA is hardly even the beginning of therapy.

Eta: sorry I see youve been in therapy for decades. So have I. Honestly I think its changed a lot recently. The 80's dont count!