Wow...I understand that a therapist can feel frustrated, but if she didn't think she could help you find a safe way to process your emotions, your PTSD, and your experiences, the professional way to handle that situation is to find a better suited therapist and let the patient know about the referral.
When a therapist is dishonest, disingenous, and dismissive, it damages relationships.
I had a therapist tell me one thing and my neurologist another, once. I was literally only seeing the therapist because a different neurologist tried to gaslight me into thinking my epilepsy was anxiety--and I was told I had to see someone to be treated for my epilepsy (a terrible reason to seek help).
I learned that I already used the coping mechanisms that most people have to be taught to deal with anxiety. As it turns out, partial temporal lobe epilepsy is complicated and very hard to treat, and neurologists fail to find it properly more often than not.
I'm not sure why the therapist lied to me that I didn't need to continue seeing her and told my neurologist that she wanted to keep treating me. I don't know why she didn't realize I'd ask him to see what she wrote him. And I have no clue why she thought it was okay to lie to me in the first place. I didn't need her, so I quit seeing her.
If a person doesn't feel safe with their therapist, they should move on. There are other better people out there. You deserve better.