tbh on the female only communities i can say that
stcstnr is quite right. After all, many times several women have given me the same piece of advice: Its really hard for a man to be truly misogynistic because nobody hates women more than other women. One of them even told me how the all comprehensive and supportive great women of her friends circle decided to start calling her a whore and a slut after being raped and how hard it was for her to have someone to speak with because she was terrified of men and women just scorned her constantly. I might not be the best on this matter, but it really gave me a lot of food for thought. The same way guys are competitive and straight up hostile with other guys, women probably do it the same way. Maybe a bit more passive-aggresively, but the intention and opportunity is there.
And on the lesbians thing, i cannot speak much since i only knew 2 and lost contact with both after a lot of drama. I will tell pretty honestly that you tend to feel for them when they are down and depressed, but after a while you realize it's mostly out of their own doing. One of them ended up trooning out and last i heard she spoke about being harassed and mocked constantly at work, home and social circles for being a TIF. The other changed gf oftenly, around 2 per year and it was always for some minor disagreement that both blew out of proportion when they started to argue over who was right. Maybe i'm lucky i don't know more.