I commiserate with you Richard!
All those great clerks in the past at the Philatelic Windows that I visited, they all had requested a transfer after many years of service. They saw the writing on the wall and opted for another position before things became a waste of time for everybody.
I occasionally still run into nice clerks in my travels. And not all of them are old-timers. Some of the nice clerks are young.
Good luck "breaking in" the new clerk!

k