Too slow.....leaving batters with too too many runs in last few overs.....OR.....Too much power hitting...Loosing too many wickets.....
Lacking proper strategy.... commonsense cricket.....
What strategy made before match..
What strategy made after first part of Match..
What instructions forwarded to players...coming out to bat after fall of wickets..or during match...
After 40 overs.169....West Indies required 100 runs in 10 overs...it's very tough even in T-20....