Yeah but the anecdote you have may also be a rare situation.

One of the other things is that women aren't necessarily violent in high frequency, so most of the criminal justice system is setup to punish violent offenders. But women usually from a young age are trained in tactics that aren't violent but abusive. Rumors, accusations, cheating to get back at people, ruining people, blackmail, et al. These tactics are less often adopted by men who prefer to just "take it outside and fight it out like men." But the justice system is geared towards stopping violence first-and-foremost. And the other types of crimes are harder to prove than simple violence.