And to be clear, we are well beyond "asshole boss" or anything legal in the western world. We are considering a situation where you are treated identically to a slave except that instead of being forced to work via beatings and supplied food, you are supplied just enough money to eat - buying everything at the company store - and forced to work by "well otherwise you starve to death".
(By food I also include things like shelter and so on...)
There are people in the world who are functionally chattel slaves who happen to receive a nominal wage, but this is not what the term “wage slavery” typically refers to; that term (and perhaps your argument, though I am not sure) equivocates wage labor with chattel slavery. I and others believe the difference is vast, important, and moral.
That's why such work is a good thing, not a bad thing. It saves people from starving to death. Which is what happens periodically during famines in extremely undeveloped countries, such as most of history.
Doing it by choice creates all sorts of ill psychological effects. It means I have to convince myself to keep doing it, and as a result I'll try to convince myself of things like "it's fair" or "I like this" or so on. I think I might actually be happier as a slave than a wage slave doing the exact same shitty work and ridiculous hours as a slave because at least I can be honest with myself about the situation.
Normally wage slavery is better - because it means that the employers can't enforce quite as shitty conditions or long hours as a actual slave. But it's not clear to me that that is happening here, and even if it is happening here if you understood your argument to rely on it.