Thinking about this more (and perhaps I'm too optimistic), but I can't help but see this situation as game time. All cards thrown on the table, nothing held back on either side.

OP needs to either accept the apology and therapist, as 'good enough' and make this relationship different from all others... Or acknowledge that she's not, and find someone that can better meet the OPs needs. I see growth potential in whatever the OP decides.