Hmmyes the gamecube didn't run like Nintendo planned, mostly by a lack of good games with the introduction of the cube, but they garanteed that that won't be the case for their next console.

But than again, in my opinion the gamecube still is the best console, it purely targets gaming, not other things like playing dvd's etc just gaming, it has the most original games (pikmin etc) and offcourse Zelda, probably the best game series of all time.
Never argue with fools... They will only drag you down to their level, and beat you with experience...