Like a lot of the SF that came out of the 60s and 70s, the series has always had an idealistic, political bent. Sometimes it can get a little preachy, I agree.
I haven't noticed that it's been specifically anti-male. It does like to pit the heroine against patriarchal authority figures, but those tend to represent tyranny, bureaucracy or the military-industrial complex more than masculine society, I think. In World Without Stars, to illustrate, the warring matriarchal and patriarchal city states are portrayed as equally bad.