Don't take my comments the wrong way. If the clerk is a PITA, then someone needs to be aware of it.

If management isn't doing anything about it, then it's management's fault, NOT THE Union's! Yes, it is eminently possible to fire or discipline a postal employee, but there is a procedure to do so, and management continually screws it up.

That having been said, I can count on one hand the number of supervisors in the postal service who I would count as competent.

There are many supervisors in the system who are sweetness and light when dealing with customers, and unholy terrors when dealing with employees. There are window clerks who WERE pleasant employees at one point, then found their attitude when dealing with management and customers. (I've seen customers berate people for little to no reason too many times in the limited amount of time I spend at the window)