In my novel, the FL is a jacked former gladiator who isn't pretty. She's six foot tall and muscled, and covered in scars from fighting with men. In the novel she states that she understands that while she's muscled and strong, she will never be quite as athletic as her male counterparts, and that she tries to fight with her head, instead of rushing in head-on like a berserker, she fights dirty.
Its just a simple fact that men are more athletic than women. Rompin' Rhonda Rousey could probably kick MY ass, but she wouldn't have nothing on Chuck Liddel in his heyday.
The same is true for warriors in a fantasy or historical. How well you fight is mostly determined by how strong you are. Throw that "the bigger they are, the harder they fall" bullshit out the window. Anyone who knows anything about fighting knows that a big fuckin' guy can hit harder and faster, and a well muscled big guy can hit harder, faster, for longer. All while wearing heavy armor that they are capable of running around in because of their musculature.
You see this trope a lot in media, a big slow dumb guy loses to a little smart guy in a fight. But reality aint like that. Big guys aren't that slow. They are faster than skinny guys actually. Take a look at olympians who do the 30 meter dash, they are all built like line-backers. This is because their powerful muscles allow them to push off the ground harder making them faster.
In a fantasy, there needs to be magic or something to even the playing field so women can fight on equal terms with men.
In Game of Thrones there is Brienne of Tarth, she can fight with the men because she is simply a huge bitch. Arya stark doesn't really fight too much, she mostly sneaks and assassinates.
Women today can fight with men because we have guns. A bullet doesn't care if the one shooting it is male, female, old or young. It will kill you regardless of strength.
I had a crush on Vasquez when i was a kid. My favorite character, right next to bill paxton whining "game over man, game over!"