The biggest problem with the post office is the management. They make a decision and are never held accountable. In their defense they are forced by elected officials to do stupid things. Now all that being said I do not understand how or why every letter I send with the same zip code as my house has to go to Detroit area (Allen Park I believe) to be sorted. Rarely have trouble with letters going over the state line to Toledo. Strangely Toledo's mail is also sorted in Detroit area.
Around here many of the rural delivery personal are not regular employees any longer, and they want you to supply the car. The best part is the management cannot figure out why their employees give a darn is busted.