I'm not an expert in DBT (nor do I play one on TV.) I do know that the usual course of DBT is 3 hours of therapy a week, for a year (2 hours of that being in a skills group.)
How long have you been trying DBT; what lesson are you on?
I also do know that it's part of the therapy to get their patients "riled" or upset and then lead them to working through it.. breathing, meditation etc.
I'm sorry that you feel you are being treated negatively. I do hope you realize that borderlines often feel this way about therapists when they are confronted. However, I also believe that you might have a T that doesn't understand the true VALIDATING nature of DBT.
Validation is the key reason that DBT was created, as an extension to regular CBT. Borderlines were found to need MORE validation, yet therapy needed to progress in a different manner.
If you can have a DIALECTICAL session with your T regarding these feelings, I think that would be great! If you continue to feel invalidated, I would ask that if you could post EXACTLY what the discussion was, we here at PC can better assist you to decide if DBT is what you need.

TC