What if Hope isn't the most powerful aspect? I believe that Rage is just as strong and can counter Hope, you see, Rage is disbelief. I have a theory that the more arrogant and disbelief the Rage players have in something, that thing ceases to exist all together.

Hope can be awfully strong, but it doesn’t necessarily mean it’s always the strongest. That being said, ceasing to believe in something to the point it becomes non-existant STILL sounds like Hope, just stopping believing rather than believing harder. That being said, Rage is still an incredibly potent Aspect, specially with its ties to straight up incoherence. Rage don’t give a fuck about the rules of the game.