I have slightly different take. Probably because I've seen both the beginning and current state of it.

"Feminism" started as "equality of opportunity in society." Phrased and limited thusly, there was no reasonable opposition. The only people who don't want equality of opportunity fit the definition of mysogenist (back then, we called them "chauvinists.")

But, then, after that basic goal was achieved (kind of hard to not see it as largely achieved, now that most college graduates are women), what next?

Well, you said it yourself. "Feminism", it's goal on track to be achieved, started moving into areas where its support was less vigorous. There was time when women who CHOSE to be be homemakers were criticized, as if their choice was subverting the "movement", when in fact the movement was *entirely* about choice. Some sections of the "movement" digressed into man-hatred, as if men needed to be punished for the past, which is nonsensical and anti-historical at best. Pro-abortionism was then added as a checkbox item, so feminists who were pro-life were thrown under the bus; and then, of course, "feminism" decided to align itself with one political party; women who believe in equal opportunity but were conservative economically were then tossed.

Long story short, feminism had the philosophic support of almost all younger women in the 60's. Since then, it has, in many ways, been telling women of different social, political and moral views that their support was no longer needed, and often in very insulting ways.

So, shouldn't come as much of surprise that some women view it as a negative philosophy.