I think a lot of man hating does go on on MN, sometimes justified, sometimes not. But its mostly on a completely personal level and from what I've seen, its always about one individual relating to one thread, and rarely about men as a whole.
I think the wider point is that MN is kind of a safe space for women to come and talk to other women and share opinions, laughs, ideas, etc. the good and the bad. Within that i think that a lot of women provide support for other women with the notion of "hes a massive arse, you're so right" kinda thing. It allows women to vent about whatever man in their life, and i don't think most of the women here are inherently misandrists trying to spread hate, it's just the way they show support to other women sometimes, by agreeing with them.
If anyone pisses me off, I love having a good bitch about them. And I think thats all it is, bitching about what's annoyed you and getting it off your chest.
That being said, I have noticed a more sinister undertone in some threads with regards to male-hate. That's always going to exist, it exists in the form of misogyny as well, as is so widely evidenced in the world it doesn't require an example.
However, I don't think MN is the sole cause of spreading hate against men, and i don't think it's particularly rife on here either. There's a lot of LTB comments on a lot of threads, and i think a lot of the time its warranted. MN being a safe space, women come here questioning whether their own relationships are abusive, and a lot of the time, they are. Its really highlighted for me quite how much it goes on in the world, and if it wasn't for other women advising these women that they are suffering abuse, should LTB, and might even call him a dickhead, then there would be a lot of women still trapped in abusive relationships that needn't be. Its not the case they're just spreading hate against men, I genuinely believe their sole intention is to help other women (with the obvious exclusion of the users who just seemingly want to put others down for anything).
Also, I haven't really seen anything about supporting women never having sex with their partners. What i see most commonly is women saying they don't have sex with their partner anymore due to lack of emotional connection, etc, and in which case I can understand why they wouldn't want to. I have seen comments "he should be grateful for what he gets" in relation to threads like this, and i have to say, I don't disagree.
I also don't think there's much indication that people here think men should do everything a woman's way, perhaps some things, and honestly I don't think thats a bad way to think at all. After centuries of phrases such as "don't be such a girl", "you throw like a girl" etc etc being thrown around (and even to this day), im not surprised women are now taking charge and asking men, why can't you be more like a girl? It was always presented as such a bad thing, but it really isn't. They are saying they need to do everything a woman's way (whatever that means), but moreso hinting at they should be more considerate, emotional, etc. I can't recall the amount of times I have been told to "man up", or "stop being so emotional" - its always qualities likened to men.
Overall I think what you're seeing is women uniting in their mindsets and discussing what works and doesn't work for them in a relationship and in life in general, and do so (mostly) without the commentary of men, which can be very refreshing not to have that male input. I love it here (most the time) as its so nice to get perspective from so many women from so many different walks of life. I would definitely not say MN is one big misandry fest that is skewing society's view of men into the gutter.