I have found over over 6 season that my first three goalkeepers never played well enough to be the sole reason we've won points. However, my current goalkeeper has on a couple of occassions been the reason, so maybe you people just have goalkeepers who are pants?
Also, I have rarely found the opposition goalkeepers unbeatable in goals. Normally when I dominate and lose it's because my strikers either miss the goals completely or hit their shots straight at the keepers. Invarible my defence then makes a mistake and we lose. Its because my team have played badly not because of the oppostion keeper.
I think people should stop blaming loses on super goalies and except that they are crap managers!