I don't get it: I've been buying Amazon prime for about 8 years now, and I don't encounter nearly the amount of problems that everyone else reports. Yes, I've gotten a few bad items from Amazon. I've also gotten bad items from brick and mortar stores as well. (I recently had a bunch of items go bad from Trader Joe's long before their sell-by date.)
It depends on what types of things you're typically buying, there are systematic problems in a few classes of products. For example: board games and 3D printer accessories on Amazon are rampantly counterfeited, to the point that it's often difficult to get the real thing. You may actually have received a high quality counterfeit before and not realized it; for example, I used my Xbox360 hard drive for years before re…
At this point, if I'm looking for a popular brand-name product, and it doesn't have some impossible-to-fake functionality (like booting iOS), I assume by default that there are fakes commingled into Amazon's inventory.