But this is exactly what you look for. How many of the bad reviews are people who seem like they whine a lot, how many are just unlucky, how many have seemingly reasonable complaints, etc.
How dumb are the bad reviews? If most are just stupid, it’s probably a good product, if you can find at least one review that really seems like it was by a real person with a real issue, it’s an indicator that some of the reviews are at least real.
But maybe that’s just a "me" issue ;)
In some cases, I've instead decided that a completely different kind of product can fill the same need in a better way.
That’s what often ends up happening, but then I also don’t want to be wasteful and buy something new before the old thing breaks.
Another is when they had a problem with something external to the item itself such as shipping.
Something like a cross between an issue tracker and a lightweight court of law.
If Amazon were whacked around the head with an antitrust stick like Microsoft was in 2001, this is the kind of innovation that might actually flourish from newer startups.