I think the feminist fanatics have an important point. Not when it comes to work or strength, but I personally have no doubt that women are superior when it comes to sexual power.

Just compare single men and single women. Who complains more and cries more. Comparing the two main-subs (/r/askmen and /r/askwomen) shows that thousands of dudes are absolutely desperate and lonely, while the women don't seem to bother at all. My personal experience confirms this. A good friend of mine became nothing than a girl's toy the last year, he's desperate for her while she can easily send him away and order him around.

I can only guess, but I presume the higher male libido and less emotion-based friendships make it harder for guys to be alone.

If that's true it could also explain why only men have to approach and run after women, although the gender-ratio is about 50:50

tl;dr: Men need women more than vice versa, what makes them weak and attackable.