“Promoted to Incompetence”
By this I mean they may have been great at their original job but they were given a number of promotions until they were in a position they lack the competence to complete.
I think only my current job had a manager that could actually do the job of the people he's managing.
Typically they're an arrogant know it all, who couldn't figure their way out of a wet paper bag and everyone knows it.