The so called "no-loss" concept (whole game) is wrong and stupid.

[Colbert30]

Why is it that some people find the way other people like to play their games so aggraviating, as to call it stupid? If you are having fun with the game, just let others do what they want.

That said, I will agree that there should be no complaining that a very tough challenge is very... tough. One that is not part of the challenges (achievements) designed for the game, to boot.