People blame capitalism, but capitalism isn't the problem. The problem, as always, is power.
Under feudalism things were much worse. Serfs worked 6 days a week, 12+ hours a day. Up to 3 days of that week was spent tending your lord's lands for free.
Under absolute monarchies, dictatorships and police states you work as hard as you can for whatever hours your employer sets, and you keep any complaints to yourself or you're dragged off to a camp, or summarily executed.
So far, every time "communism" has been tried, it was just a dictatorship or police state where the leaders pretend that there's a higher ideal.
Capitalist republics don't give people at the bottom much power, but they get a little bit. And, that little bit is the best that the people at the bottom have ever had, even if it isn't much.
The fact that there are people at the bottom isn't the fault of some political system, and especially isn't the fault of capitalism, it's the fault of human nature.