When the adaptation makes a change that pisses the creator off with how good it is

The ending to The Mist movie (2007) where David mercy kills the survivors he’s with and his son only for the military to roll up mere moments later, versus the book where they just drive off into the fog

Making the Infected in The Last of Us (2023) a hive mind where stepping on a single patch of Cordyceps can summon hundreds of Infected, whereas in the game they function individually