MC02 had a lot of problems but calling it a zerg rush exposes your ignorance-- it was a very sophisticated and well-coordinated surprise attack. The people running the wargame rejected the outcome as a likely tactic to be used by the hypothetical adversary and guess what, they have been proven right, see: the war in iraq. The iraqi army completely failed to hold initiative against the coalition or organize coherent resistance nevermind launch a coordinated surprise attack ahead of the invasion.

The other aspect that is missed in criticisms of this particular wargame is the fact that there were specific doctrine elements that were to be tested-- now the claimed outcome of those can be debated, for instance the fact that opfor had many restrictions on how they were allowed to employ their anti air defenses-- but a wargame is NOT meant to be a giant game of paintball where when one side gets hit they just pack up and go home, that would be incredibly wasteful. In many cases you have formations planning and training for months to participate in the exercise. The purpose is testing out many different aspects of doctrine, and often times that involves 'ignoring' results of one part of the wargame.