Whenever I buy anything on Amazon I look at the negative reviews and most of them are people saying they straight up got the wrong product or whatever they got came broken/scratched up right out of the box. I see these complaints often enough that I assume people aren't just lying outright, but I personally have never had any of this happen to me despite all of the junk I've bought on Amazon. It's made the negative reviews almost as worthless as the positive reviews that are possibly just paid off.
Like another person said, the 2-3 star people are often what I find most helpful. I find they tend to be people who are honest but just way pickier than the average buyer, so the stuff they complain about usually doesn't matter to me, but its still informative.