You’re effectively worrying that “this time is different,” which isn’t a good thing to worry about when it comes to humans.
The issues with Amazon’s treatment of labor can’t be solved by a few wealthy consumers like yourself deciding out of guilt to not shop at the place with the cheapest prices and best customer experience.
Workers all over the US are treated exactly the same way, but we don’t shed a tear for them because they don’t work under a big brand with tons of media attention.
Killing Amazon won’t solve the fundamental issues with the US’s lack of worker protections. We should spend our efforts working to fix that, not on conducting economically irrational behavior out of a sense of guilt from some news story we heard. Most people won’t be able to do the same.