It is, however, funny to see what the game does to hax other people's teams. =P
It is, however, not funny to see what the game does to hax your team. =P
I think I read somewhere that the higher streaks you have, the game is programmed to make teams that counter your entered team. Also, the game is programmed to manipulate accuracy, secondary effects, etc. to the opponent's favor as you go up. I dunno where I read that, but to me, it seems true.
I wouldn't doubt it. From my experiences it seems attacks just don't land as much when you get a high streak going.