As a kid I used to do that, Quit Mario Sunshine because I reached a point where I couldn't beat any of the levels that were needed to progress. Quit Metroid Prime after dying to Flaagra a zillion times. When I finally beat the boss I had very little health left, missed the save station that's after the boss room, at got promptly killed. I was not about to go back and do it all over again. It was many years later that I finally went back and beat both games and found neither as hard as they seemed when I was a kid.