women have far more empathy for men, than men have for women.
Female behaviour is under far more scrutiny than men; while bad behaviour from men is always excused and this is expressed in thousands of ways from the seemingly trivial, to the most serious.
You can see it in every aspect of life from complaints that men don't pull their weight in the house (drudgery of routine and unseen tasks are beneath me dear, but not for you) to many poor relationships where there is a inbuilt power ratio biased towards the man; to the denial of widespread rape because women are in a state of perpetual consent and have to look sexy, young, attractive and up for it all the time.
And when women are deemed to be past their prime, that is around 40+ they are simply invisible and disappear from mainstream media, TV presenting / adverts etc as if subject to some invisible cull that just does not apply to men. There are no female David Attenboroughs or Steven Fry's celebrated as treasures of the nation for their knowledge over their appearance.
I don't think there is an innate imbalance of the sexes. It is cultural and therefore a culmination of many choices that, in effect favour a man; from the seemingly arbitrary valuation of people by how much they earn which on the whole tends to reward men more than women; not only by effectively penalising time taken away from work to raise children; but by deeming traditionally female occupations such as caring, catering, childcare as massively inferior by pay.
Our scrutiny of women starts from birth; from the masses more baby girl clothes than boys in shops (the message being that we have to judge the appearance of even baby girls in a way that doesn't apply to boys) to a culture that sells anxieties to pre-teens and women that we are not good enough without make-up, sexy clothes, lipstick, to attract that cute guy etc to sell products in a vicious cycle where profits end up generally in the pockets of rich men (most CEO's are male), serves to keep women in their place as playthings of men, and fuel more anxieties which sell more products etc.