#1 Inexperience
The Indian team has some very talented players. What let them down was their inexperience of playing competitive football. The fact that the team needs more match practice is something that de Matos has stressed on constantly.
It was inexperience that cost them the game against Colombia. It was inexperience that led to the penalty through which the USA broke the deadlock in the opening game.
Being a part of a FIFA World Cup is a tough experience. Moreover, the heap of expectations from the home fans meant that India were under a different kind of pressure. The youngsters did their best to deal with this and gave a good account of themselves but still, it was not enough.
The young team would have definitely gained a lot from the campaign. Unfortunately, it came to a disappointing end but the future is indeed bright.