No. Because you can quit and work for someone else or work for yourself.

Realistically many can't. It's a nice illusion of choice to be maintained though, gives the system more power for self-exploitation if you are a true believer.

Not if everyone else is the same and you don't have capital to work for yourself.

That's delusional. The vast majority of people lack the economic and social capital necessary to "work for themselves". Instead, they must compete with each other to work for someone that keeps the majority of their output, or risk falling into the ~10% of the population that is unemployed. I won't defend communism, but claiming that capitalism is the best system for workers is very dumb.