Instead of Amazon's early days where I'd see a large range of options and quality/price levels, I now deal with page after page of the same low-quality options from a large number of "different" suppliers. Increasing my spend doesn't work, as they've got that angle covered, it's just the same items but with a higher price. I can't even rely on reviews, since those are gamed too.
Then when I did find the item, the next hoop to jump through was the scams, when it's clothing: it's often a knock off using stolen photos, or the wrong size, or return instructions that demand delivery to a far away country even though the goods didn't come from there.
Then there are the issues with counterfeiting, or worse, like when Amazon's own staff steal the product by swapping the contents of the box - something that is incredibly difficult to prove with customer service.
Now if I want to shop online, I visit a store's website and buy directly. No scams, no counterfeits, no wrong sizes or b/s photos.