Our society is patriarchal, so there are no alpha females in our speccies
There are only alpha females when
a) the society is martriarchal - ex: Hyenas
b) in monogamous societys, where there is an alpha couple and therefore and alpha female - ex: Wolfs
Those females you talk about are just overly confident, i guess you just have to get the inner game to sarge them

outgame them with your confidence. Also you can lower her confidence too

.
I am new to the game, but i have a lot of female friends like that...and i can tell you even their confidence has limits.
Good luck,
Shadow