lol. i'm a newbie too. I cannot explain in detail. it's just my experience because I play with 4 accounts so.... however, I concentrate in 1, only.
i think ur squad is to counter diamond. however, his team does not attack in the middle. in detail, his dl and dr block ur amr and aml. in the middle, his squad is more than ur. that enough to counter ur team. maybe in the possession, u control better than him. however, when he can counter-attack u will lose. that's my opinion.
sorry if my English is not good enough to make u understand.