I actually not surprise with that, though 1.4M is really a lot of money to be lose on a 1.01 odds. I remember when some user bet a 100+ BTC on bustabit and loses so no matter how low the odds is you will definitely lose if luck is not on your side. I actually tried it before (not with big amount) but with my whole bankroll to place bet on a crash game with the automatic withdraw at a multiplier of 1.1 and in just around 3 rounds I lose my whole bankroll.
Can we call this act a greediness as people think that when they see 1.01 odd, they can't lose, the chances of winning this bet is more than 99% and therefore they spend a lot of money on such bets and hope to gain money ?
In gambling, anything can happen, even if you think you have a 99% winning percentage, but there is still a 1% chance that you will lose, and that mostly happens to him. The risk is much bigger than winning, but for sure he thinks that it is a sure win, so he bets on it. In sports, comebacks are not rare right now, unlike before, so for sure his emotion when the opponent got the winning points can't be explained. The lesson here is that we should bet what we can afford to lose. I am hoping that he is okay with losing such a huge sum of money.
Money management can be another lesson to be learn from this incident.
Losing in gambling and betting is normal but if you follow money management technique's and best practices you can never lose big money.
Most people ignore this fact and keep on losing their capital in gambling.