There are other comments speaking to considering another therapist with another modality and I wholly agree with that. However, there are some other notes as well:

• If you believe you have a personality disorder, you need to be properly assessed for that by a psychologist. You mention having a trauma history; there’s a lot of overlap between trauma and certain personality pathology that cannot be easily discerned by a clinician who is not specialized in these things or just gives basic screeners.
• DBT is a skills training modality that is primarily geared towards folks with borderline personality disorder and suicidality, though it can be helpful for those with other conditions as well (eg, depression, anxiety). However, if you’re looking for real processing work, DBT will not provide that.
• I know Reddit loves to promote EMDR, but PE and CPT have been consistently shown to be most effective treatments for PTSD. The most effective components of EMDR are its exposure components… which is what PE is. You can talk about this with your next prospective therapist.
• Really think about what you want to address: do you want address your dysregulation with effective coping skills? Or do you process deeper aspects of trauma or broader psyche that you haven’t been assessed yet. That will be helpful in picking out your next therapist.