Group therapy has had this effect on me....some pdocs too. My therapists have had "looks" that were unhelpful but never criticized me and that tactic would not work for me. Some people find it motivating so I guess some therapists keep doing it. It's playing with fire and dangerous business with the wrong person and I think it shouldn't be done. You can't change the past so saying anything about years you've wasted is pretty freaking disgusting stuff. Encouraging you to do better, helping you explore why you made poor choices is good. I second the recommendation of telling your therapist how this effected you and seeing if you can work beyond it and define better parameters for what is motivating for you personally. Therapists are human too and make mistakes. Perhaps you could help them not make them in the future by pointing out the issue?