I just saw this post too (I don't come into this forum much). I am so sorry that your dentists have been awful. It makes no sense that he wouldn't be willing to treat you because you saw another professional. It makes me wonder if there is a professional (or personal) rivalry between him and this endo. I also have a great dentist I would send you to if you lived where I grew up. He (and his co-worker) were amazing. They would paint the flouride on my teeth because I couldn't breath with the fluoride tray in my mouth.

I hope your new dentist is awesome. Sadly dentists (and other doctors) can be like Ts where the first one (or more) don't fit what we need. You would think it would be easier since it is just cleaning/repairing etc teeth, but it can be challenging too.