In 1984, the game of rebellion is unwinnable against Big Brother because it's the state versus the individual. It's hundreds of people with millions of dollars of resources against one person. It's an army with bombs and bullets and tanks against one defenseless person. It's a million eyes and spies against one.
See the mismatch?
Not only that, but the individual has no idea who he's fighting. Winston thinks there's a Big Brother, but there's not. He thinks there's a Goldstein, but there's not. He thinks the proles will rise up, but they won't. He thinks the state is fighting the Eurasians, but they're not. He thinks Charrington is a sweet old man, but he's not. He thinks O'Brien is a rebel, but he's not. Winston is so isolated, weak, and without resources that he doesn't stand a chance.
Not only that, but there's torture. Winston has his body summarily broken. He is starved. His head is put in a cage with rats. His teeth are pulled out. He is psychologically broken: O'Brien convinces him that 2 + 2 = 5.
The odds of a rebellion of one beating a state-sponsored war machine are astronomical. It's not even a game. A game has rules. A game has two sides playing. This dystopia is completely one-sided.