1. India didn't had it's key players playing like Rahul and kohli. So it was always a pressure situation. Even you not see on face but it lies well within them
3. Rahane was New captain with very few experience in Captaincy. He only captained 4 matches before it.
4. Gabba was the ground or I would say fortress of Australia where it was unbeaten for past 33 years
7. The bowlers which were bowling had a total of 13 wickets in International test matches whereas Australian bowlers had a combined number of 1200 wicket in tests. These guys managed to take all 20 wickets but Cummins, Hazelwood, Starc and Lyon couldn't.
8. India had many youngsters batting with very few experience like pant, gill, sundar and shardul thakur. Still they scored for team India when it was needed the most