I have the same experience. I tend to try to buy stuff that Amazon sells directly and I regularly pay a bit more for items that seem to have better reviews or, at least, less reviews that give me pause. And I do buy a fair bit of electronics and so forth. I wonder how many of the people who seem to have such bad experiences buy solely on price even when the price seems too good to be true.

Case in point. I just bought a couple of Samsung Qi wireless chargers. There were certainly cheaper ones listed but this one won Wirecutter recommendation so it's what I got. Are there counterfeits? Probably. But they probably aren't packaged like the legit item.