I've only had two therapists and the first one I had was crap. After that crappy therapist, I learned how to do a better job at finding a good therapist. Maybe my story will help you out--

My crap therapist was literally convinced that I didn't suffer from depression, no matter how much I told her I felt depressed. "I don't believe you're depressed, nor do I believe you're bipolar. You don't seem bipolar to me at all." She literally said that to me.

The problem is, sometimes I get a melancholic depression. I basically get every symptom of depression except sadness. Well, my crap therapist assumed I wasn't depressed because I didn't feel sad... which is stupid because I was miserable!

Turns out that she "specialized" in ADHD and anxiety disorders. She had no obvious experience with mood disorders, despite having "30 years of well-rounded experience".

My new therapist has a PhD and he specializes in mood disorders. He's younger than she is and he already knows a lot more than she ever will. I think he's so much more understanding because he's genuinely interested in mood disorders. Does that make sense?

So from my experience, I'd say it'd be helpful to find someone who specializes in mood disorders. Find someone who's interested in mood disorders. If you do that, you'll start off on the right foot.