Well, the top google search says that misandry "dislike of, contempt for, or ingrained prejudice against men (i.e. the male sex)."
So by definition it's misandrist when someone "dislikes men" for any reason. You can't pick and choose what counts as their reason.
(And I very obviously wasn't saying that all men rape, I can't believe you NAMALTed me in response!)
I actually wouldn't be surprised if some feminists (and non-feminists) "hate men". The moment you see the results of millennia of sexism all around you, it's hard to gaze at all the perpetrators with unblinking adoration. Add in some shitty experiences and I can easily see it turn to hatred, or something like it.
That said, the boards here don't seem rife with it. Any time there's the remotest hint then there's lots and lots of people taking it down, and sometimes more fuss about that than the issue being talked about.
We're very eager to never get it wrong because (sarcasm aside) any poor activity by one person gets reflected on to the movement, and people like you come along saying the entire board/movement is shit.
As an aside, I wonder if the same people would go on to a predominantly black forum advocating for rights, where some tired, angry person sick to the back teeth of racism writes in frustration "I hate white people". Would you type angrily "Your racism is appalling! You're putting me off as a white person! Not all white people are bad, you whitist."
I'm guessing usually not, you'd feel uncomfortable approaching a group you acknowledge to be oppressed. You'd think "something's made them that way, maybe someone's been really shitty, I can't judge". Even if you were a member of the same community, you might be cautious because you'd think you'd obviously had different experiences, and you could sympathise with the feeling of oppression they're expressing.
But women are just oh, so, so much easier to tell off. Especially because we're socialised to always be nice and reasonable and placate people.