We lose whenever Nazimuddin's not in the side. Just look at our overall win-loss record in all 3 formats and then see just how many of those Bangladesh teams had Nazimuddin in them. I bet over 99% of losses were with teams without Mohammad Kohlimuddin Amla, the tragic hero of BD cricket. Then look at our wins with teams with the man playing. I bet you'll come upon a much higher percentage.
If we lose when happens to be in the side, it's always someone else's fault.
"And do not curse those who call on other than GOD, lest they blaspheme and curse GOD, out of ignorance. We have adorned the works of every group in their eyes. Ultimately, they return to their Lord, then He informs them of everything they had done." (Qur'an 6:108)