I've heard a lot of negative things about Amazon as an employer (mainly from current or ex-Amazon people), which is depressing because they're an awesome vendor and I want them to continue to be able to get great people and thus produce awesome stuff. (I've also heard "but X group is awesome and not like that" too, though.)
they are a great vendor by facade, they bully and collude with their suppliers to drive up prices on consumers. they systematically bury competitors with a trojan horse strategy on their marketplace. using dirty tactics and infringing on anti-trust, they can always appear to be the best vendor to consumers.
I go to a relatively well designed website and get products delivered in 1-2 days for cheap. From that perspective, I really like them.
AWS, while absurdly expensive vs. metal IMO, is also something a lot of people have built on, and it's evolving so fast that no one has caught up to it, even when companies like Rackspace, IBM, etc. recognize it as an existential threat.
This really doesn't help things on that front.