Stadium: Will Virat Kohli-led team India learn from the English tour?

In a special cricket show by News Nation 'Stadium', watch how Virat Kohli during press conference counter questions to a reporter when asked about the reason of losing the Test series. In reply, he also said that this is the best Indian Test team in the last 15 years. So, is this agression justified for a captain after losing series 4-1?