Feminism in modern society is a strange thing. Feminism has a long history with discrete waves and motivations, and there's a modern population that largely doesn't understand them.

One of the more progressive ideas to be embraced by (some in) the current wave of feminism is total gender neutrality in society. Things like chivalry couldn't be compatible with this wave, because something like chivalry reinforces notions that femininity comes with certain conditions and expectations. It will be "ladies first" but that is because ladies are weak, helpless, "pure", etc., and will be expected to behave like such in society. It strives to redefine the concept of "feminine" to strip it of it's insidious restraints of women. So the current state of feminism is pretty nuanced and evolved, but a lot of people are clueless to that.

Rather, you have a lot of people who think of feminism in terms of the attitudes of the first wave: marked by anger and rather reactionary. You have people rallying for and against feminism on these terms such that it has become the commonly perceived face of feminism.