It's not whataboutism at all. I am genuinely curious, why now and why Amazon? People did not just decide to start peeing in bottles when working for Amazon, it has been happening long before.
People did complain about other companies. A decade ago it was Walmart that was the company everyone was talking about how poorly they treated their employees (which they still do in comparison to competitors like Costco). I think the reason why Amazon is getting the focus now is because Bezos went from being merely a very wealthy man to (depending on the stock market) being literally the wealthiest man in the world. So you'd think he could afford a bit of generosity towards his warehouse workers.