The left’s hatred on patriarchy

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As an uneducated Brazilian monkey who finally started to do some real research on humankind's social and historical issues, I am genuinely astonished as to how the topic of Patriarchy is underrated and even deemed as an evil force that hold backwards mankind’s evolution in the modern academic enviroment.
Given all the scientific evidence on the biological differences of the sexes, given all the historic data on the functionality of the sexes in regards to social cohesion, given the fact that all somewhat successful civilizations of this world were built under patriarchal social system, how is it possible for people to deny not only the benefits of patriarchy, but also its nature as an non-negotiable part of the civilizational process?

My question for /pol/, given all these common facts about patriarchy, is what can possibly convince an educated person (considering first worlders have the best education systems) that patriarchy is the source reason of social demise, when it is actually the natural step for social cohesion?