India U19 team could have performed better than expected but they may have been nervous for which they could not do that.
I tend to agree, with teams like India or SA, it has become more of psychological thing, despite having skills to perform good they underperform.
There is saying, "with confidence half the battle is won" — when big stakes are involves there are teams like Australia who are rather confident in their strength, look how they played against semis when 9 wickets were fallen against Pakistan, or look at Cummins and Maxwell's history making partnership in ODIWC against Afghanistan, they know how to perform under pressure, nothing is perfect and there are definitely exceptions in Australia's performances too but most of times they do perform good.
Indian team needs some mental coaching too aside from physical.
The Indian Under 19 team lost yesterday's match. The Indian team had a personal fight with Australia because always Australia beat India. In this match, Mahli Beardman is the man of the match, and the player of this World Cup was also announced yesterday, he is from South Africa Kwena Maphaka took 21 wickets which was such a very great performance by him.
If you search on Google who is the land of batsmen so you will see India and when their batsmen had time to perform so they explained why we are cokers. Before them South African team was the Chokers but now slowly Indian team wants to become it.