I can only talk about what I've seen personally, having no idea why this seems to be a thing, but compared to men, women are fucking cruel. Two guys get into an argument or a fight, you might have some raised voices, a little name calling or if things get especially bad, it might escalate into a physical fight...but guys don't seem to hold grudges. They get that shit out of their system, cool off for awhile and things (usually) go back to normal.
A woman will try to DESTROY you if you piss her off. I've seen them lie about their ex husbands during divorce proceedings, saying they raped their children. I've seen them call rape if they break up with a boyfriend to get back at them. They bully other girls in school into eating disorders, or suicide in some dire cases. A guy will just call you a fag or exceptional or something.
Guys have their issues at times also, but Jesus women take it to a whole new level of fuckery.