It would be great if buyers had an Amazon account health system. I've heard there is one but it's "internal". Make it public and in their face. Educate the buyers that they aren't skimming out on Amazon but actual sellers on the other end.
This could help address issues like false claims of "item delivered late" when it wasn't, or returning items as "not as described" when it's really just buyer's remorse or they want to simply return it. If buyers could see a record of their own questionable return behavior and realize the potential consequences—like their account being flagged or even closed for repeated abuse—it might reduce the number of bogus returns and discourage attempts to get items for free. Such a system would benefit both sellers and the marketplace overall.
This year has been one of the worst, and it seems like I am not alone. I think the biggest one that ticks me off is the "item arrived late" when it clearly was delivered in the promised timeframe window on the order.
Or one that I just got this morning. "Item not received, please refund me". Well luckily this one was shipped with FedEx and they took a photo of the delivery. When I told them on the tracking there is a photo of the delivery, they were quick to change their tune to "Ok, thank you, Merry Christmas".