Amazon has been in bed with the devil for a couple of years now. Nearly everything I order comes by USPS - the slowest, least reliable delivery service on Earth.
This is in direct opposition to my experience.
The Post Office doesn't seem to understand that this is their last best chance to stay relevant and possibly get out of the red. Nope, they're sticking to their old ways - yesterday's technology delivering your packages tomorrow (or next week).
Huh? Oh I see - your experience of their service is essentially filtered by your dogma (that the post office as part of the "government" is not hip enough). Keep in mind, that the USPS as a private entity that's highly controlled by Congressional edicts and orders (like this one mandating that they essentially have to run in debt to pay retirements for employees not even hired yet . If you have an issue with USPS maybe you should take it up with your representative.
Another thing you have to keep in mind, is that the USPS actually fulfills a lot of orders for UPS/FedEx - UPS/Fedex simply can't compete with the USPS for hard-to-reach areas, whereas the USPS has mandates to do so, and so has found a way to do it.