I didn't watch our bowling but if Ajmal, Afridi are hit for runs then the pitch probably is to blame, I am sure there was some lacking in bowling/fielding too. Hafeez was probably the best with Econo rate of only 2.7 when everyone else on our side went for 6+ while BD bowlers went for 4+
I think it happens once in a while and the balance of the bowling unit got disturbed when Rehman who was brought in place of Junaid bowled stupidly and got banned. It was pathetic what he did.