Have you ever asked RachelAnn why she did those things, and talked about feeling hurt by them? I don't know if you have any way to communicate with her now, or if it would be a good idea to make contact since you have a new T, but those are things worth addressing when they happen. If your new T ever does something that you feel hurt by, you should talk to her about it and not hold it in. The best person to consult to get perspective on that person is usually that person. She might have felt it was the best thing for you at the time, given circumstances that we aren't aware of.
If she was doing actual DBT, then part of that is being available for phone consultation, but phone sessions in between regular sessions are supposed to be very brief and to the point, not warm and friendly. DBT therapists need to have a consultation team to work with, because it is a very demanding type of therapy. The DBT philosophy emphasizes the client being responsible for herself, asking for help when needed, using resources that are available, etc. and not reinforcing harmful or destructive or less competent behavior - so, regarding the time she didn't check on you when you were suicidal, the fact that you did get through it without being checked on supports that she did the right thing that time - you were responsible for yourself. Good for you, btw.

The same might apply to having a flashback in the office. If you weren't responding to cues to use your coping skills, T has no other option than to stop reinforcing the behavior. It might be that she was following protocol on some of those things - and, yes, it can feel very painful. I don't know the circumstances of her terminating with you. It is not ethical to abandon a client, but you did find another T and are still getting treatment, so you had the resources available to keep getting help, right?
As I said, I don't know all of the circumstances, but wanted to provide another perspective. Most therapists do their best to do what is ethical and in the client's best interest. That isn't always what the client wants them to do. I can't say if she did anything wrong, or not, and I'm also not judging how you feel about her or what she did. How you feel is how you feel, and for good reasons. Since it is all in the past now (unless the therapist is unethical and likely to be harming other patients), the best that you can do now is to accept how you feel and decide what is most effective for you now. Will you feel better if you find out that T wronged you? How does that help you? (This is a legitimate question - perhaps understanding why you felt hurt can help you not to be hurt in the same way again, for instance). How do you want to remember her? What do you need to do for yourself now so that you can move on with your life and keep getting better?
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“We should always pray for help, but we should always listen for inspiration and impression to proceed in ways different from those we may have thought of.”
– John H. Groberg