I understand the good enough mother to be a mother who provides sufficient care and love in order that the child learns to tolerate the (inevitable) instances where its needs are not met. The mother creates sufficient safety for the child so that it experiences its unmet needs as manageable. She is satisfying the child and giving it enough; she is giving it enough good stuff that the bad stuff can also be integrated. This seems different from a definition of a good enough mother which is based on an idea that the mother is almost perfect but falls short in some way. This latter definition seems to be what you are using to describe your therapist - he would be perfect if only he didn't pick his teeth and tuck in his shirt. This sounds like a kind of idolisation to me, you can't really integrate his imperfections and would rather not fuss over them. Perhaps if you were experiencing him as "enough", it would be safe to tell him that you are angry or irritated or repulsed by him.