That's a frustrating and unhealthy communication pattern, to be sure.
Just out of curiosity, have you read either of these articles on communication?
https://bpdfamily.com/content/ending-conflicthttps://bpdfamily.com/content/listen-with-empathyWhen you're dealing with a pwBPD, arguments and conversations are very different than you'd find in a normal relationship. I know with my H, when he's gotten worked up about something, it usually turned out he was actually worked up about something else -- or feeling guilty for something. For instance, lashing out at me for being the "drink police" when I chose not to drink. In reality, he felt bad about having a couple of glasses of wine and decided to attack me for being a stuffy, judgmental person for not going along with him.
Sometimes it's a lot easier to navigate these conflicts if we can understand more what they're about. If you "replay" your confrontations with your partner, does anything stand out that might be a clue?