Why is it so hard to find a therapist?

I've been to 5 different therapists since I was diagnosed with depression years ago. Since I was diagnosed with Bipolar it has been much harder finding a therapist that fits. Every one that I have seen in the past doesn't really listen, some of them just watching the clock the whole time. I finally got insurance and have been looking for another therapist. I have been searching for one that specializes in bipolar and/or trauma but they all apparently "specialize" in every disorder and life situation. I feel like it's so saturated with therapists trying to make money without genuinely caring for their patients. I hate spending so much money just to find out that my therapist isn't a good fit. I just want to get better :(