Contrary to what tails just said, Yahtzee does enjoy a good story in his video games and he almost always comments on the story's behind each game he reviews. He was quite generous when he came to describe the story of MGS4. His main complaint was not about the depth of the story (which I agree is a key element of the game) but rather it's implementation.
Neither myself, nor Yahtzee wants the story shortened, just the mini (not that mini) movies within the game dominate the time so much that playing time is hard to come by.
In the end you are a fanboy trying to defend a good game that could have been better.
@entrepreneur in - I agree, that boss fight, whilst meant to be "epic" failed rather miserably. Clunky, repetitive animations combined with repetitive gameplay and mediocre gun fight combined with overly drab scenery was most boring. :(
Edit: I think Zen Bane needs to watch this episode...with some minor changes this could easily apply to him and MGS4. Specifically listen to his section on "objective/subjective" reviews and the part where he says "you shouldn't let it get to you".