Funny thing, though. If it were possible, I'd have Amazon block their own shipping service, for the same reasons. I've asked, and it isn't permitted. In my area, USPS/UPS have been rock solid, but ever since they largely switched to their internal FBA, I've had late packages at least monthly. It's clear they're buckling under the Christmas load, too. I've had over a dozen items delayed thus far.
I've had some utterly ridiculous situations, like having an CCTV capture a package being delivered, the driver taking a picture of the delivered package for tracking, and then the driver leaving with it. I've also had them deliver packages to the wrong apartment numerous times, taking pictures of floor mats that don't even exist within a mile of me.
But boy do their delivery people suck. The number of times they've called me asking where I live... that's their job to figure out, not mine.
Kinda laughed the other day as my amazon delivery person was also delivering postmates at the same time. No wonder they're not hitting their deadlines.