I think you do bring up some good points about how a lot of the weakest AAA games now are either extremely over-iterative and lose appeal by virtue of sharing large parts of their design with their past iterations, diluting the novel good bits (Assassin's Creed), and trend chasers (that most popular online FPS games chase battle Royale and extraction shooter genres, though battle Royale seems to be finally dying off.
It takes something like Doom, a game that bucks the trends, but doesn't stumble on the execution of something fresh, but rooted in strong game direction and execution. Or something like Hogwarts Legacy, a rote-on-paper genre of game (open world) kept fresh and interesting because of its long-time-coming incredible choice of setting and the ways that it uses that setting to benefit the gameplay and immersion (the magic combat system, broom riding, and lots of sprinkled bits of lore that reward long time fans of the world)
But even then... imagine ten years down the line if there's a Doom 6, and they let history repeat itself...