> Even if you valuate your time at the local minimum wage, even a small claims court is going to take more time than is worth it for one person.
Small claims court awarded "lost time" (in the loser pays) in the few cases I'm aware of. I know of several people who've taken a local retailer to court (Not quite Amazon, but think of e.g. New York's PC Richards and Sons size), and were made truly whole for a $200 case (that is, got their $200 back, and a few $100 more for effort). If these things happen in the US, I haven't heard of them.
> The real problem is the huge asymmetrical advantages companies have, in any jurisdiction, in screwing significant numbers of people just a little bit.
Yes, but situation in Europe is IMHO a bit better, both from the small-courts, binding-arbitration-instead-of-courts looked down upon, and much stronger regulation on rights, like fit-for-purpose, lemon laws, and even things like GDPR.
The bottom line is, regardless what the rules say, a person in Europe suffers, on average, much less than the power asymmetry - although they do pay for that upfront with higher prices (which also pay for other stuff like education and universal medical care - it's hard to untangle, but it's protection that likely isn't free).