There is nothing of the sort in here.
The actions of one individual never indicate a group.

She's what would be referred to nowadays by achingly right on film critics as "a strong female role model". You can agree with her methods or you can disagree, but you have to admit she has (pardon the phallocentric metaphor)
balls
.
No Guru, No Method, No Teacher.

It is a very educational movie. There's nothing evil about its anti-feminist message.

If you want to find evil, you'll find it. If you want to find goodness, you'll find it too. Choose wisely.

The movie also depicts the (temporary) liberation of these men from their inactivity imposed on them by misandrist rules, and celebrates the ideals of adventurism and the rituals of manhood.

Good analogy, though I have never related feminism or anti-feminism to the film. All I see is one questionable, despicable and unethical character who just happens to be female. But if she represents what feminists stand for, then perhaps the OP is right. I think Ratched was fueled by her hatred of men.
Don't eat the whole ones! Those are for the guests.

I can kind of see where the OP is coming from. Feminism is a collective order of women like Nurse Ratched, trying to control others to make themselves feel bigger than they are.
Get off your soapbox while I play you a tune on the tiniest violin.

What makes it a masterpiece of anti-feminist cinema? Apart from the main antagonist being female, how does this make it anti-feminist? Women can be evil, with or without feminism.
Don't eat the whole ones! Those are for the guests.

jangoq
We have to get used to it : now every film is meant to be a statement on feminism, sexism, racism, up you azz=sim.

Wrong.

You'd have to be a feminist troll to think that in the first place.