Consistently bills arive late. After sending at least 10 days in advance of due date.
Open mail consistently, most of the letters that look like a card. That might be holding a gift card, etc.
Long lines at the actual post office where over worked, stressed out, and understaffed employees work.
Where legitimate complaints about mail, packages go to die because there is absolutely no accountability or care in the world about most or all of that because of what I wrote in the last paragraph.
I would say It is a useless org but that is obviously not true. It desperately needs gov funding, more people working and better organization if it wants to stay in business.