There is to be an issue here bro the player knows about the odds and then he still bets meaning he knows the risk here so it is part of the game in my opinion. and if you ask me how a good gambler should avoid such mistakes? the answer is there is no mistake here it is just probability and then he chose it from the beginning.
Although 1.4 Million USD is definitely a lot of money but just imagine if he win he still make a decent profit there haha
When I was a gambling addict, I looked for strategies to win. I went from 1x2 to other ways to bet. Then I noticed that I decided to like 1.03 odds which was very common. It encouraged me to bet with huge amount of money. I might be winning but at last I will lose more than win and the losses are very huge. One of worst mistake a gambler can make is to gamble with this little odds like 1.01.