I too stopped shopping at Amazon a little over a year ago after returning to the US. I stopped shopping at Wal-Mart in 2009 and simply see Amazon as the new Wal-Mart.
But you and I and everyone else who decides not the shop there; we don't make a dent. You cannot vote with your dollars. There are still way too many people who don't care or who follow the advertising. It's the reason why Uber will be around for decades.
Public Relations/Propaganda/Marketing is amazing. McDonalds convinced millions of Americans the girl who sued for spilling coffee on herself had fought and won a frivolous lawsuit when the reality was far from the truth: