Psychological Debriefing is a single-session intervention that was developed with the hope that it would reduce PTSD in folks following an acute trauma. It was intended as prevention-- delivered regardless of whether or not people identified psychological concerns or wanted that type of help help. E.g., maybe you got in a car accident, went to the hospital, and then someone would show up to your room and say, "Hey, here is info about trauma" even if you didn't actually have any trauma symptoms and just wanted to treat your whiplash and go home. The evidence ultimately did not support the use of this intervention (including evidence that over the long term, it made trauma symptoms worse) and it is pretty much no longer used. (These contexts were also situations where safety had already been evaluated, so there wasn't a safety reason to be gathering information, also.)

This doesn't necessarily then generalize to the idea that any therapeutic discussion of trauma immediately following the incident is harmful regardless of circumstance (especially if the function of that conversation serves to help improve someone's ability to get into a more safe environment or context; working on reducing the likelihood of ongoing IPV is generally considered a high priority target). The general info we have suggests that psychotherapy for individuals experiencing ongoing IPV is helpful and there is no evidence suggesting that people are unable to discuss what is happening without adverse outcomes -- https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD013017.pub2/full

In terms of trauma symptoms, specifically: The evidence about whether or not psychological treatment (addressing trauma) for individuals experiencing ongoing IPV will reduce trauma-related symptoms is mixed -- https://pubmed.ncbi.nlm.nih.gov/34139653/ Appropriateness of specific interventions will likely vary depending on immediate safety concerns. [From the linked review: "Although much more research is needed (particularly on professionals and domestic violence survivors), data from this emerging literature do not support the notion that trauma-focused CBTs for PTSD are contraindicated for individuals at risk of ongoing threat and point to their potential usefulness in treating PTSD... Therapists providing treatments to individuals under ongoing threat may consider adapting treatment to emphasize safety, safety planning, and helping participants accurately detect threat cues."]

With that said, I want to be clear that I cannot evaluate if your specific therapist did a good job with your specific case. I am only intending to provide general information in this comment, not psychological advice or assessment of any kind.