The last 5 orders that I've made - with intermittent attempts at boycotting the store between them - have all had something wrong with them. Amazon literally can no longer fulfill an order completely up to par: There's always something that you have to refund, resend back or just gripe about. Minor details, big problems, there's always something.
They're an "always something" service. Yes, there are products you can't get elsewhere. Yes, the price is often cheaper. Yes, they're easier to use than others. But they simply fail at the simple task of actually fulfilling your order more often than not. I've stopped thinking about where to move my purchases to simply starting to reconsider whether I need a particular thing in the first place. It's pretty much the only way you can get off these services :( That, and being infuriated over and over and over again by the inadequacy of the service.