It’s because that’s how capitalism works. If you keep buying stuff from the same source without due diligence, you can’t be surprised when you get stuck with another sucky game.
The only incentive to spend resources on fixing a game is to preserve reputation for future games.
Yup I think of some games as fidget spinners, they’re just zoneout games that fill time… then there are games with amazing stories, mechanics, characters, graphics etc that provide real, if shorter experiences.