Working for the USPS is a shit job, it doesn't pay much, you have to piss in a cup and take an exam and wait around for ages to find out if you've got a job so the most desirable people get offered some other job and subsequently take it while the USPS is still trying to figure out where the application is. So they apparently just hire whoever actually takes the time to go through the process and you end up with a bunch of dingleberries. They still don't have anything clever like automatic detection of routing loops built into the system, like every other shipper does. Sadly, they are the cheapest option by far.
It's not just USPS that's gone downhill, either. California Overnight used to be super fantabulous. Now Amazon is using them and it's nothing but complaints. Who knows where they delivered our stuff. We got it refunded and/or replaced (it was several items) so the only problem was a delay, but still. This shit isn't rocket surgery. The number is on the mailbox and there's no other mailbox at this driveway. It's not hard.
I've had no end of problems with the USPS, I think someone there has got it in for me on a minor, low level so they just dick with me. It all started when I requested a hold via the web. I checked the box saying I would come to pick up any accumulated mail, and in the special instructions box I said "OK to deliver letters but please hold all packages". They held everything, which was OK, and then when the hold ended instead of holding the mail for me to come pick it up as requested, they delivered all of it and it got soggy in the rain. After that they decided to hold all of my packages forever and ever amen, whether they were supposed to be held or not. I had to go in and argue with them about it twice to get them to stop.
Now the problem I'm having is that apparently all small packages from China (or which look like they might have come from China) are apparently for me. I order a lot of $1-5 crap from China on eBay, apparently more than anyone else in my post code, because they routinely mix other people's packages in with mine. I just write MISDELIVERED on the back in big fat black magic marker and drop them back in the mailbox. They told me to stop writing on them, but that's bullshit. I'm doing precisely what you're meant to be doing, and they're just trying to hide the fact that they are not giving any fucks.