If anyone is getting heated up after losing, that's a very big red flag and a sign that something needs to be changed.
If one is to engage in gambling at all, the approach should be as emotionless as possible. Getting frustrated with the outcome usually indicates that a person wagered much more than they could afford to lose.
You're right, sometimes when you lose you can't help but feel some pain, and a little anger, but with yourself, because everything that happens in a casino is your own fault, there is no other way, as far as Personally, I have always said something, when it comes to doing things better sometimes we have to learn to control our emotions, and anger is a very bad feeling and it can lead us to do crazy things, some rage players bet more money and that is not good at all, because that is when the bad things begin, it is a characteristic that can lead directly to addiction and when you fall into addiction the problems are very gigantic.