I was in this game.
You may call it cowering, however we only had 2 tanks i believe. Nod could have won easily. I was 1 of those tanks. I was on the bridge in the middle, damaging and killing tanks left and right, yet pretty much noone payed attention to me.. I was alone with 1 repairing hottie. The rushes were not well thought out (from my perspective at least). To me nod was just throwing points at gdi, like Yosh said, you probably focussed on the wrong things and didnt weaken gdi in anyway.
Point system is not perfect, but the point farming problem should be solved by map design. If someone can camp a building completly safe, it is more a map problem than a pointsystem problem.