Your experience with USPS or whatever has zero relevance to whether the next person is going to receive their package. If the seller isn't helpful resolving the issue, leave them a negative review. But it makes no sense to review the product negatively.

People aren't complaining about USPS it's about the scam listings with obvious fake reviews. Half the time the review pictures don't even match the product because the sellers have some scam going on that somehow is OK with Amazon. That Amazon won't let me leave a warning to the next user makes Amazon an accomplice in the fraud. I've just started leaving fake 1 star reviews of the product since Amazon loves fake reviews anyway.

Sorry but the down votes won't stop me from leaving negative reviews on Amazon, I owe it to my fellow shoppers.

Are you aware you can review sellers separately from the products?

You replied to a comment about products being lost in the mail.