I agree that this is a very disturbing comment for a therapist to make.

Where to begin? The whole point of therapy is for a client to come to a better place than (s)he is at right now. The therapist's job is to help you do that, if that is what you decide you want, rather than complain about where she perceives you to be now--and she shouldn't be invalidating/insulting about where she thinks you are now. She shouldn't issue threats. She shouldn't be trying to push you to where she thinks you should be.