I suspect that what she lacked most of all was the will to fight back and survive.
If she turned and ran, large healthy coyotes could certainly cause problems.
I’ve had the German shepard-sized ones in my backyard. I could certainly see them killing a small adult if they worked in concert and the adult wasn’t inclined or prepared to defend herself.
I’ve also seen a wolf pack hunt a cow elk. They take turns chasing, will not be distracted by other prey once they establish their target, and are relentless. I would not wish to be their target.
Sounds like Zer0 and the Chicago mob in DC.