I think it's generally okay to complain about a system that forces you to pee in bottles due to lack of restroom breaks. People have quit, and they still have every right to complain even after quitting
Sure, but then why are you still working there if its so terrible?
Try to imagine a situation where this crappy job is the best of the available options.
Most people in America would not have any money for food or shelter if they missed just one paycheck. When the option is between pissing in a bottle and becoming homeless, most people will piss in the bottle. That's a choice people shouldn't have to make.
They’re not forcing anyone and most workers don’t do that. The ones that do are probably just not productive and are making up the loss of production by peeing in bottles. That’s not necessarily an indictment of the company. Their policy, from leaked documents, is that workers should not be doing this.