Is it the selector's who select the squad the the captain/coaches actually select the playing 11?
If so, not sure what else the selectors could have done, that would've been the best squad they could have sent over
Indian cricket is very much a popularity contest, Kohli was a walking wicket for at least 18 months there and his position was never ever in any danger, Rohit Sharma in this world cup was very ordinary (particularly as captain), KL Rahul very disappointing as well
Now to the bowlers, they elected to go with finger spin over wrist spin (Ashwin and Axar Patel over Chahal). Finger spin doesn't win you games of cricket in limited overs cricket in Australia, their pace attack was good enough, they lacked a depth option but what they got from Arshdeep Singh and Bhuvneshwar Kumar with the new ball was good enough to put most teams under pressure, except for England of course
For mine, their lack of runs in the powerplay cost them big time, especially against England. Even through the series their overall strike rate in the powerplay was under a run a ball, that's not good enough in T20 cricket. If someone had of told me what will bring India undone, it wouldn't have been their batting, it would have been their bowling. Arshdeep Singh was a revelation