I think people give large organizations credit for being mustache twirlingly evil when the collective consciousness that makes up AWS is simply not smart enough to be this evil. If AWS had the coordination to do this the product would be better.

It's much more likely that the complexity is the result of a huge number of teams working independently and integration complexity being 2^n. Like AWS had one good transformative idea to make coordination easier which is to be API first but that only forces superficial consistency.