Here today, did you actually feel attached to the therapist(s) like many people who post about it here, or was it more "attachment" to therapy itself and wanting to get better? Because if the latter, I can easily imagine the frustration persists because therapy and the T got the in the of your goal for improvement and you still don't feel your problems are resolved completely.

In terms of how to heal from it, I am not sure it is possible any better than from other kinds of disappointments and betrayals in ordinary relationships. We can get to a point that it is not acutely painful but still a bad memory and sense of failure with something in which we invested a great deal of time, money, mental energy etc.