If someone can post fake negative reviews on Amazon, Amazon can certainly afford to false flag negative reviews on everyone else. So either both parties are tru

If someone can post fake negative reviews on Amazon, Amazon can certainly afford to false flag negative reviews on everyone else. So either both parties are truthful or both parties are manipulative. Plus, it takes nontrivial effort to plausibly explain how a product is defective. In case a popular product is simply handled by Amazon or other sellers, they aren't responsible for the quality itself. Bad review of a keyboard on one site is as valid as on another.