In my own experience as a female...
Of all the women I have known, I can only think of a couple who bullied others -- men and women, alike -- they had no discernment.
Of all the men I have known and encountered, I have thousands of memories of men bullying or oppressing me (even if only subtly). Many of those experiences were of them automatically/immediately dismissing me -- perhaps even snorting with their superiority -- yet I was totally justified and correct! Is it any wonder that I now enjoy denouncing and challenging their idiocy here on this forum?
I've had a lot of female friends in my life, and we all have been very supportive of men; we want the best for men, just as we want the best for all.
And I love men. Most of my closest friends have been men. I appreciate their perspectives when they are being wise, respectful, honest, and caring -- and when they are not ruled mindlessly by their ego and body appendages. Seriously... we can be more than that... and it's much more interesting! My male friends express disgust, too, in low-level male standards of behavior and thinking. One friend refers to oppressive and competitive behaviors as: Peeing higher on the tree. This is not an issue that women have made up about men, and women should not be blamed if awareness of it is rising and evolving.
Think about it... if a certain group of people are defining and controlling the majority of the world, built on the limitations of their qualities, while they oppress others who might expand the world beyond those definitions and controls, then that group of people can greatly stagnate awareness and potential.
My outspoken nature on this website about men is no different than my outspoken nature about religion or any people (male or female) who are being dishonest or acting stupid. It's fun and liberating to confront such things (here) in provocative and entertaining ways. A lot of people are numb to absurdities they believe or say. This forum is a place to be very vocal in challenging such things in a way (and using methods) we might not do in person -- because here, people can choose to enter the "truth arena" and have the floodlights turned on. Whereas in a one-on-one situation in person, a much softer and measured approach will likely be more effective when dealing with absurdities.
I have never denied sex to a man as some sort of tool. My female friends have never told me that they do that either. I know of women who have "not been in the mood" when they were upset about something, and I think that is completely reasonable. If that makes the man feel like a controlled, sniveling worm, that sounds like his problem.
The conclusions made by Duncan sound like distortions based on limited awareness and information -- and based on that, he has put it together the best way he knows how to preserve his ego. In doing so, he demonstrates the same limited and rigid male patterns that many people are eager to evolve beyond: archaic notions such as exalting men as being superior for control... putting women in their place... and blaming women for being "evil". Surely there are many, much better possibilities to experience.