I'm sorry that happened, sounds like she recognized you two weren't making progress and she's firmly taken steps to stop wasting your time. I would suggest you find a new therapist specializing in OCD and work through all your feelings about this termination with the new therapist.

As for your T seeing others with OCD, I can only imagine that it was just a case where every individual presents differently and no one therapist can treat everyone with OCD, there will be some folks who need a different style than what your former T could offer.

I know it must be painful and am sorry it did not work out.