Well,from what i remember is that they are Matriarchal because a lot of their main gods are female,it doesnt really comes from a pure sense of superiority,they simply trust command to the females because they are a race composed mainly by self concerned jackasses,so it makes sense for them to give control to females who suposedly watch better for the bonds of the clan,it makes sense too the fact that they arent a total copy/paste from the average in this game,since Tinkerer bound them to another god,instead of their traditional Triad of Gods from D&D,and yet even with all of this,you can still see some of that on Erevi's personality,so even if they werent a Matriarchal society on PQ lore,they are still dominant as fuck,and pretty hard to deal,as you could see in the first interactions between Erevi and MC