I used to get very upset, just ask anyone in a group game with me on Xbox Live, but as I've aged I've mellowed considerably. Sure seeing the Bomber lose was heart breaking, but for me it was a temporary thing. During the game, I've flip on the ref for missing an obvious call, or the command center for again screwing the Bombers, only to have the wife come and close the den door to lessen the sound of my shouting. For me a couple minutes or hours later I'm over it. I have other things that occupy my mind. I work with a guy that really seems to struggle with things, not sports related, and I've had to talk him off the ledge a few times. Everyone deals differently with mental illness but please please never think you have to deal with it alone. There are resources everywhere to help https://www.canada.ca/en/public-health/services/mental-health-services/mental-health-get-help.html.
Just pick up a phone and call. Hell even email me if you need to vent.