The trend of labeling women “crazy” is part of the culture that socializes women to go along to get along. When women are told over and over again that they’re not allowed to feel the way they feel and that they’re being “unreasonable” or “oversensitive,” they’re conditioned to not trust their own emotions. Their behavior — being assertive, even demanding or standing up for how they feel — becomes an “inconvenience” to men and they’re taught not to give offense and to consider the feelings of others before their own.
Casually, even reflexively calling women crazy and the stigmatization of “crazy” (i.e., inconvenient or uncomfortable) behavior has become a way of trying to keep women behaving in a very specific and limited manner. It perpetuates the madonna/whore dichotomy — that women are either submissive, demure and sexually restrained or irrational bitches on wheels, the emotional equivalent of riding Space Mountain after five shots of Mescal.