Not really. It's basic contract law versus some small game company lawyers (compared to Apple's). Also, putting out parody ads and making fun of the whole thing will get you zero points in any court. Even if a court accepts this at all it will take years to finish. Meanwhile Epic is out of luck.

Netflix and Amazon make you carry out purchases offline, and then they don’t pay for the store fee.

Why doesn’t Epic just have a subscription model, wouldn’t that circumvent the App Store?

Credit card companies charge 3% just to swipe a credit card (and fixed fees can make small transactions 10-15%) — Apple is charging for hosting the game, certifying and ensuring security for its user base, and carrying out the financial transaction. What would be the appropriate percentage?