If Jesse hadn't decided to kill Gus' other dealers for killing the 11-year-old, and let Gus handle it, Walt doesn't have to run them over with his car, and everything doesn't go sour with Gus, which eventually puts them all on this road.

The point is that Jesse fucked up a whole lot to get to them to this point. And now he's serving his penace. He's trapped in his version of Hell, forced to cook Blue Meth for Todd and the nazis, under threat of death of the only people left that he cares about. And it appears he'll be stuck doing that until at least Walt shows up with his machine gun, if I were to hazard a guess. It's also why I think he'll make it out of this show alive, 'cause he's really "paid" for his actions.