Yes, I have had some problems with dentists too. A former dentist I simply could not get to understand that she was responsible for the work done by her business, no matter who at the business did it. If it hadn't been for issues about proving that teeth had not been correctly treated with the consequence that decay progressed I'd have sued her just for the hell of it. THe dentist who did the work went back to Ireland.
At present I am trying to figure out what to do with my upper right 1. It was root treated long ago (and maybe the drilling was a bit too deep - the bamboo thing that gets put in after the "file" is used can be seen in x-ray going a bit into the jawbone). There has been subsequent cosmetic filling (a nice matching shade of dark grey to go with my teeth!) - and current x-ray shows a lateral crack so the tooth is being held together by a bit of tooth down one side, a bit of ceramic filling (or maybe it was one of the clever ones that sets with ultra-violet light) - and the other side is the crack.
It won't last for ever.
My current dentist is telling me that the root treatment has left insufficient tooth to put in a post for a crown, and the old fillings mean that there is not enough tooth for a crown without a post. She would like to put in a bridge, but I am not keen to have to have the teeth on either side (which are sound by the relative standards of my teeth) ground down to take a bridge and then capped. I think it will be a weak structure and I will never be able to crunch an apple again!
But I don't really fancy being gappy.
Were there not some clever new-style implants being done in Sweden some years ago - a screwed mount being put into the jawbone?