Why are people so compliant when clearly this world in "1984" is so miserable?

It is very simple, actually. Not only are the people scared, but they are 3 other things as well: 1) They are apathetic. We see this even today, the mentality of "What can I do to change anything? I'm just one person. It is hopeless to even try, because then, I'll die.' 2) They are kept in ignorance. Big Brother has altered the past so much, the people think that this is better than anything else. "After all, look at how much we win in these battles. Look at the numbers of shoes we produce. We are superior to other countries." They have no idea how much better off they'd be if they overthrew Big Brother. 3) The ones who know are in positions of power or dead. Power and Death are good persuasion tactics to keep a person's mouth shut.