Well, now you’re moving the goalposts. I’m not arguing that workers are never mistreated. I would agree, sometimes they are, and that is bad! But it’s overly hyperbolic to say that US employees have no rights at all. They do, just not as many protections as a few other countries.
As an hourly, non-exempt employee, I had a legal right to overtime, paid breaks, and unpaid leave and other things. DOL signs were posted at the workplace, as is required, to inform workers about their rights. My employer (Best Buy) followed the law and I appreciated those legal protections, which the employer otherwise probably wouldn’t have given me. This is an anecdote, but is an example of a worker (me) having rights.
To be clear, that’s the specific argument I’m making. American workers have some rights, regardless of whether they’re perfect, or perfectly upheld. That’s obvious, isn’t it?