My regular mailman, and the workers at the Post Office in my area seem like great people. My mailman even gives dog biscuits to my dogs when the wife is out walking them.

That said, there seems to be regional hubs of the USPS that operate like those black hole vortexes that swallow space and time. Depending on the direction from which I order something, I will have wildly different experiences while watching the tracking. Some directions of travel through certain hubs come very efficiently, while certain areas of the country (hubs) things sit and then the route makes no sense.

Personally, I think city, state, and regional politics are the reason for these "problem" hubs (or the workers that run them), but I cannot prove it.