These are all just platforms, and cannot reasonably be held responsible for the action of all their users all of the time. And I think any reasonable-minded person, and most judges, have to see it that way too.
This "complicit" is a misuse of the English language, I think. Bezos is not in cahoots with the counterfeiters here. That is nonsense.
People have been accultured to expect some kind of protection everywhere, all the time. Well, guess what? It's a big world and there are a lot of scammers out there, and nobody can protect you all the time. You have to learn how to protect yourself.
Amazon's review system is one way to protect yourself. I think it isn't bad at all. Read what other people have to say about a product and the vendor before giving up your credit card info.