Technically there is a "storefront" page for each seller on Amazon, but it's not easy to get to and is awkward to navigate. Here's an example of one:

https://www.amazon.com/s?me=A30QSGOJR8LMXA

Overall I'd agree, though -- Amazon has gone out of their way to take focus away from the individual merchants on their site and give customers the impression that they're buying items "from Amazon".