I think you did explain it well
The reason why I still think this therapist is the one who has messed up is because in the context of previous instances where you feel you haven't made the best of things (having loving parents etc) it is natural you would assume you are going to repeat that pattern in therapy. That sounds to me like a normal reaction, and not something to shame you for or threaten you with termination.
You came to therapy for something, so if your T were to concentrate on the little part of you that believes change is possible and begin to discuss why you haven't made the best of things in the past, you might be surprised yourself about what progress is possible.
I hope you don't give up on yourself because of the lack of insight on the part of this therapist. There are many good therapists out there who can help you recognise patterns in your life and instigate change.