I have been experiencing a lot of what you are mentioning for years at the place I current work. The problem is that any code review feedback can be provided under the guise of 'quality' - once that Q-word gets into the discussion, it's very hard to argue that it doesn't matter or is not worth the time.

Not that I don't want to write quality code, but nitpicks in the name of quality are the code review equivalent of a death by a thousand cuts.