In a game, or anything else, that you kept interested after you learned how to cheat in it?

I found a way to cheat on D&D online years ago, and after a bit I lost interest. I also found a way to cheat on Pokémon Go, and also I quit playing. In High school physics the answer’s were in the back of the book, and I also lost interest.

Is that normal? Can you suggest an exception?