Dhoni declared too late, became too defensive

Indian captain Dhoni was not right and did not act like a true fighter when he became too defensive and kept on playing even on the 4th day. This deprived a much sought of victory to India. When you have 90% chance to win and 10% chance to equalize, you have to be a coward in order not to take a chance. No team in the world could make even 500, so Dhoni could have declared at least at 531 which they got by the end of 3rd day. The decision was a big stupidity when you know even the weather forecast.