I have absolutely NOTHING against that, and I've said that. But playing something over and over and over and failing every single [censored] [censored] time for days is not "Challenging" it's just [censored] stupid.
The term stupid is subjective - I honestly prefer these sort of challenges over easy/moderately difficult ones. And not every challenge will be quite so difficult, so there will be a little bit for everybody. While I understand that may be frustrating for completionists, the truth is that completing/unlocking everything 100% in games typically requires at completing at least a few difficult tasks, or at the very least, a significant time investment. That concept is nothing new to the realm of video games, and is just something you'll have to contend with if you wish to unlock everything.
Bear in mind, I'm not trying to change your view, as you're certainly entitled to it. You had said you couldn't see how someone could fail at something for hours and call it fun, and I am/was trying to illustrate how I view challenges to help answer that.
However, one thing I DO disagree with is the statement that you'll probably end up returning the game itself over a few challenges, something I find - no offense intended - a tad childish. I'm sorry, but letting something as trivial as a few unfinished challenges ruin the entire game for you is, as you put it, "taking it to a whole new level." I can understand your frustrations with extremely difficult challenges, but there's no real reason to deprive yourself of the game as a whole.
After all, would you return a game such as Battlefield: Bad Company 2 if you couldn't beat the campaign on Hard? Or Modern Warfare 2 because you couldn't beat High Explosive on Veteran?
Call me crazy but I don't like games that piss me off (kinda like this "discussion" has) and would prefer to play a game that I enjoy and have a fun time playing.
Except for what's gone on between you and Capt. Awesome Man, which came after you made this post anyway, I really don't see why this discussion would anger you. If we were all saying "LOL WTF D00D STOP SUKING AND MAN UP, YOUR OPINION ISN'T VALID LAWL" I could understand, but for the most part I believe everyone's been pretty respectful of your opinion, even though most have disagreed with it.