I wonder if it's because, as women (mostly), we can find it easier to reason through some less-than-ideal behaviours displayed by other women, but less easy to do so when men display behaviours we don't like?
Women is short tempered and snappy? - Her kids are running her ragged, she's overworked and under appreciated and has no help in the house.
Woman uncommunicative and unwilling to engage? - Maybe she's depressed, needs a holiday..etc etc
We find it easier to put ourselves in the position of other women because we too have been stressed and depressed. Men also can be stressed and depressed but the reasons and inciting incidents tend to be diffeent and maybe less relatable, so we are slower to reason them through.
Maybe that's why, as women, we are damning men, rather than saying, 'yup, pretty much everyone else is a shit, deep down.'
A lot of my ex's haven't been bad men, they've been inexplicable men - the one who tidied the shed when we had people coming and the house was a mess, the one who walked twenty feet in front of me whenever we were out, the one who kept me up all night 'talking to me' and wouldn't let me sleep... Not bad. Just behaviour I couldn't comprehend, and therefore live with.