In defence of Bangladesh, NZ and India's first games were in the era of 4 (and even 3?) day test matches, so it could have been much easier to batten down the hatches and go for the draw.
They'll get there. But Tushar Imran is awful. See Bangladesh's averages (Test, FC [Bowling Test, FC]):
Hannan Sarkar 28.8, 28.1
Al Sahariar 22.6, 30.1
Habibul Bashar 34.1, 34.6
Sanwar Hossain 17.1, 32.6 [53.5, 26.5]
Tushar Imran 8.7, 15.6 (Yes, 15.6 FC)
+Khaled Mashud 16.6, 27.5
Alok Kapali 33.6, 19.7 [161.5, 21.9] (Age 18)
Rafiqul Islam 3.5 (1 Test), 32.7
Tapash Baisya 13.8, 12.1 [120, 36.2] (Test 52*)
Manjural Islam 2.8, 4.0 [57.1, 42.9]
Talha Jubair 3.3, 5.0 [51.4, 48.0] (Age 16)
Plus
Mohammed Rafique 20.7, 22.5 [68.3, 17.2]
Aminul Islam 22.3, 31.1 [149, 59.4]
Javed Omar 23.7, 26.2
Mohammed Ashraful 25.8, 25.4 [223, 32.4] (Age 18)
Another thing to remember here is that a lot are still very, very young. Alok and Talha seem ones to watch.