I'm so sorry that this is happening. I have also had times in my life where it's been extremely challenging to let go of my indignation. I really sympathize.

It strikes me that learning to let go of your indignation, your need to be right and your need to express your frustration and anger ought to be your number one learning objective in your training to become a therapist. As I see it, this is way more crucial than anything else you might be doing in school.

If I understood correctly, you might be ready to qualify as a therapist in two years. That is very little time. As many people have mentioned already, it is totally fair game for your program to judge you on your professionalism well before you are certified as a professional. You can excel academically and still not graduate over concerns about your professionalism.

Having BPD can be awful and the circumstances that lead to it are beyond one's control. But it is not okay IMHO to still be controlled by borderline impulses as a therapist. The damage that one could do to others is really beyond measure. In DBT you learn that your feelings do not require actions and that, in fact, you ought sometimes act opposite to how you feel. Life is going to hand you many more opportunities to practise those skills. Use them well.