It’s true you will never get rid of all of it but, just like crime, basic enforcement is a deterrence. They know who’s buying, they know where they’re shipped, they have a fair idea if they’re returned. Just requiring reviews to be from purchasers after they’ve received the product, removing positive reviews for returns without replacement (or flagging them as returned), and a few other steps would make fake reviews either very expensive or very expensive for the results.
The fact is, Amazon makes most of their money on AWS, and I don’t think they care to put in the real effort to make their marketplace trustworthy again. Without that, it will continue its downward spiral.
My computer doesn’t support Win11, so I have that going for me. Transitioning to the Steam Deck for my gaming, which has been a slow but mostly positive process. Some of the games don’t play well outside of Windows, but none of the ones I really want to play, and I can always switch to my computer if I do.
I don’t think I’ll ever own a Win11 computer.