To generalize the behavior of all members of a category whether it be gender, race, nationality or age is the definition of discrimination. I feel it's important to resist falling into the trap of our emotional biases and reflect and attempt to change if we have.
There are people who genuinely can't deal with losing. That applies to men's as well as women's fans. Very few in that group will ever admit to it. It's not perceived as an admirable trait. However there are multiple alternative explanations for this behavior, some of which are indeed admirable. We can guess at people's underlying motivation, and even probe it. But in the end grace is the most noble thing any of us can employ.