You can only get to this point in gambling when you become addicted and obsessed, Letting it dictate how you feel simply means it has a grip on you and you are no longer doing it to have fun, this can be very unhealthy if you ask me because it can cause frequent emotional and psychological depression. Gambling can also affect your mood when you take a very high risk, some even go as as using their life savings, if you end up losing such a high amount it would definitely take a toll on your mental health. It's best to gamble with what you can afford to lose
All this are expressions of indiscipline gambling because I believe that's the best explanation to why any one will gamble this bad, and getting to this point in gambling, you are definitely going to have it affect your mood, it's not rocket science, no one will see their life savings going down thw drain and not panic at some point, its almost not possible.
When gambling for the purpose of making money off gambling, this is one of the biggest challenges one gets to suffer because you only get affected so badly when you are using an amount important to you to gamble, such that could be considered that which you wouldn't want to lose.