Should I change dentist?

After 14 years post broke on 3 teeth bridge. It had a nasty taste.dentist put new post and Zirconia bridge for 4 teeth to be stronger.After 1 year convinced my doc that the bridge was loose & taste never went away. The post got loose, broke again, so had to pull out the tooth and had a new bridge ceramic to metal. Now I have tart taste from under the crown that caps the live tooth, chipped bridge & feel the margin with my tongue. Can it be leaking margin and dentist doesn’t want to admit that?