That's not what's happening here. This is clearly some kind of a macho planet where the guys are either in charge or a privileged minority and get to pick and choose who to date while the women have to bend over backwards to have a shot, not unlike irl guys in Japan who struggle in a small dating pool where women have a lot of agency. These women are assertive not because they're dominant, but because they're the ones who have to make a move to get picked.
The only one struggling here is the MC because he's a meek outsider who doesn't throw his weight around enough.
Right I understand that this is what's happening, that's my complaint. Less than 30 percent of their planet is male. At that point, women become the dominant force by default. Women have to be the ones to set up infrastructure, fight in wars, maintain the country because men become a valued resource by default. You, as a species, can't afford to let men die in large scale, that will doom you, so the excess is what becomes expendable: Women.
That would also make men a prize to be won by women considering they're so scarce, and women by necessity have to be dominant. Women would compete against other women for the ability to reproduce just as men did in our world. And it would likely go to the strongest woman who was able to keep her man the safest and well fed.
This is what my problem is. Assuming that this has always been the case, a world of mostly women wouldn't have people acting like this, they would be incredibly reserved/feminine by nature because women would have had to be the historic leaders and hunters and gatherers and protectors. The author tells us women are aggressive and shows us that one in the beginning, but is ignoring that total gravity of what that means for the story and world overall while considering the premise.
THAT is my problem with the story. It's half baked.