@sabogato If I had the time, I'd look into this. You raise a good point, but in my lay opinion, I think matriarchies would treat men better.

Fewer men are needed to maintain a society than women. One man can knock up an entire village, but one woman can carry only one (or a small number of) children at a time. Consider a society with a gender imbalance. If it's mostly men, there's a big incentive to hoard women, and thus treat them as property. Whereas if the society is mostly women, there is incentive to share men, likely giving them more autonomy. Either way, I think there is an imbalance that encourages men to have more power.

Don't construe this as a rationalization of patriarchy or anything like that; I'm just speculating on the sociology of why men rose to prominence, and the question of how matriarchies would treat men.