When you go into see a therapist, they should be able to outline for you what therapies and tools they will use to try to help you reach your goals and help you fix your problems, or learn to live with them better. Even a psychodynamic therapist who leans towards being a blank slate should still have a plan.
For example, if you went into a therapist with a goal of reducing perfectionism, improving relationships, etc, a therapist should be able to say after a few sessions that they can try to help you achieve that goal by using exposure therapy, CBT, DBT etc... It might take a few sessions for them to assess, and the tools they use might change, but there should be a clear path of treatment your therapist is able to outline fairly early on, and is able to return to that and make adjustments. I ask every therapist I have seen, what should I work on this week. If they repeatedly don't give me homework, I find a different therapist. Not all therapists do this - some see therapy in a more meandering way. That's not because they don't care --- there are much easier jobs with better pay than mental health field. But I've seen a few that I left because they couldn't outline a plan forward and how therapy would help me. I went a found the ones that could outline that plan.
A DBT therapist should especially be giving you homework, diary cards, worksheets, coaching you through skills to use.... if she's not, she's a horrible DBT therapist.
Use your anger to fuel you to go find those therapists in your area that can be much more practical and responsive. It might help you to find a path forward that feels more hopeful, and that might help you gain a better sense of closure with this therapist.