Those first 50 games were crazy because you were matched randomly with other new and established players, so sometimes you would play someone really good who would steamroll you in the first 5 minutes, and sometimes you got someone who had at most played the scripted campaigns against the AI and thought they could sit there for the first 30 minutes slowly building up an army.
It was actually pretty fun not knowing which way it would go, and whenever we matched with newbies my partner and I got to experiment with a bunch of different strategies that would never work in a real game.