Earlier quoted context omitted.
Bray didn't quit over the conditions in the warehouses, he quit over Amazon's brazen and dishonest firings of organizers. It's possible that if every Amazon warehouse were run as well, those organizers would not have arisen, but it's Amazon nastiness toward them that's most alarming.
Have you considered the possibility that Amazon actually treats their workers okay and that it's the organizers are dishonest? Why does the presumption of evil only go in one direction?
https://www.theverge.com/2018/4/16/17243026/amazon-warehouse...
https://www.theatlantic.com/technology/archive/2019/11/amazo...
https://time.com/5629233/amazon-warehouse-employee-treatment...
And the wikipedia page: https://en.wikipedia.org/wiki/Criticism_of_Amazon