Clearly one round of gac invalidates my whole opinion. Again the system forces people towards a 50% win rate, so either youre then beating everyone else, or beating at least some of those big accounts throughout the year. Ive always said it does suck if you are the one they decide to play against, but you should really post your ally code because id be interested in seeing both your and your opponents history.
Also, did you see my comment about if they actually seeded all accounts into leagues by their gp? You'd be pretty much in the same level, certainly the same league.