I do what I can to avoid Amazon where possible, by either ordering directly from the company or by using a competing online retailer. But sadly my employer uses AWS and we even have to train/certify X% of our employees to use it. Even worse, I suspect just about every step in the process of getting my product depends on AWS in some way.
I'm trying, but... there are a lot of vendors who only sell through Amazon. Some of the alternative vendors are even worse. And Amazon is in so many sectors by now that saying "don't use them" is unfeasible. It's like saying "don't use oil" in the 1950s.
Wherever possible, I either shop local or use an online vendor I know to be more ethical. And I encourage others to do the same.
But to seriously sort this out requires action at an international level. Without that, even in the unlikely event we break up Amazon, they'll just be replaced by A.N.Other unethical company. They're like the mafia - we need to do more than lock up one family, we need to get rid of the whole kit and caboodle.
The problem with this approach is that you're biasing your purchasing decision based on what companies get the most sunlight.
We want to encourage companies to be more open, not closed. Assuming that Amazon is worse than Walmart or Baidu or UPS because you haven't heard about those other companies lately just encourages secrecy.
Amazon is displacing Walmart which displaced all the Main St. mom and pop shops that kept the country running. Main St. shut down, out of business long ago, so the only alternative is Walmart, which is just as bad.
Somewhere in there is the catalog business as well, Sears, JC Penney, etc. I imagine those were also perceived as disruptive, but it's been so long we're mostly forgotten