"Labor rights veganism" isn't the goal. You seem to be suggesting that unless someone can achieve ethical perfection, there's no point in doing anything. I don't agree with that.

You also seem to be applying black-and-white thinking to problems of right and wrong. Some things are more wrong than others.

On a scale from "single mother cheating on her taxes so she can feed her kids" to "cold-blooded murder," Amazon is (in my opinion) beating puppies with sticks. When someone does something not just wrong, but inexcusable, and is unapologetic, I don't say to myself, "well, lots of other people have done/do bad things." I doubt you do either.