There are a lot of good answers here that expand on broader social problems, so I'll focus on reasons given by men in my life.
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Equality is legally enshrined, therefore any women still complaining are just experiencing the same things as men and calling it misogyny
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A litany of reasons men are unfairly treated as well, all real, but taken out of the broader context of how much worse it is for women.
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Misogyny isn't real, people are just assholes.
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There are a codified differences between sexes and therefore different roles we need to fill, stepping outside those roles brings depression and misery.