Hell-ish, but not quite there. For me, it'd be more of a hell if there was no future or thing to look forward to or plan for. No goal, no life.
At least as a slave, you know you have something that needs to be done and can control the doing of it. And you can still pretend to have something to hope for.
"Yet, the right act
Is less, far less, than the right-thinking mind.
Seek refuge in thy soul; have there thy heaven!"
ENTP: Being trapped in a room with doors which had signs that said "Caution: Danger" or "Do Not Enter" and a bunch of "Do Not Push" buttons, and being physically incapable of attempting to violate any of these warnings.