No, it's clearly someone lashing out in anger. Fed up with their abysmal material conditions and feeling like there was no viable outlet for meaningful change. Likely feeling completely isolated in both their workplace and community. Warehouses are notorious for their union-busting measures, I doubt this warehouse was an exception.

China is infinitely more of a Democratic Republic than the United States. I'm critical of their lack of robust labor rights and welfare systems. I also don't live there so not really relevant to the US Labor situation. USSR doesn't exist, also not relevant here. Even with all that in mind, across the board China still has more labor rights than the US does, which while that doesn't say much, still goes to show how little of a leg you have to stand on here.