I need to talk to the Bobs
At its most cynical—though it is also a logically inescapable conclusion—this is best expressed by the Peter Principle: people are inevitably promoted to a position that is just beyond their level of competence. If we accept the Peter Principle, then we must also accept the consequences of that. People who evaluate the performance of their underlings are likely to be incapable of such an evaluation.
Read the whole thing, it’s short and worth it. The most interesting bit is the assertion that one needs to be an expert in order to spot other experts; this seems obviously true in retrospect, but I hadn’t thought of it that way.