Sportsball is kinda a shit term - you don’t have to like sports and yes society venerates it over far more important achievements/pursuits, but it’s a bit childish to refer to it in that way.

My theory is that a lot of that kind of poor behaviour is generally from men who have grown up with the toxic masculinity traits of believing that sad is bad, angry is manly. I’ve seen people openly weep over the outcomes of a game - I think these people are feeling the same emotions but haven’t been given the societal permission to express it in its true form. So they do angry instead. It’s not acceptable at all but that’s what I think the reason is.