Will not take any New ma patients

I have gotten 2 root canals and 2 crowns at this location and they were performed terribly. I saw another dentist and he said its the worst crown he has ever seen. He then showed me an X-Ray of my root canals. One of my root canals was very poorly done. After they take your root out their supposed to fill that space. It is not completely filled so I am going to have to get another root canal in a couple of years. I hate the dentist, and that experience just made it even worse.