Gambling should come with an understanding, those that have the wrong expectations in playing games always fall under the category of those being disappointed, because they are not going through the right approach to gambling, instead they are on a wrong mentality and work by what is merely impossible to achieve in gambling, these will lead to one action and the other until everything became obvious that everyone knows and sees them.
It's true, and it's evident from his facial expressions and way of speaking that when he wins, he puts his words into action. But when he loses, he often withdraws, thinking, "Where else will I get more funds to play again?" His ultimate fantasy is winning the fight and recouping all the capital he's previously spent.
I think whatever it is, when it's time for a break, it's best to relax, join friends, and laugh for a while to relieve the stress. There are still plenty of opportunities if he wants to return in a more relaxed mood and less mentally stressed by his previous defeat.