Yes Amazon returns are much more streamlined. I could drop most returns off at my local Kohls. Just show the person my barcode on the phone to scan, give them the item and done in 10 seconds.
Walmart's actual return policy has always been better though. I've taken stuff there that I don't even know was purchased there and got a credit. This was some time ago so not sure if it changed, but they used to give you a few receiptless returns per year.