The short version: Black Widow routinely beats up better quality of mooks than Daredevil, and she does so with less effort and while taking less damage. That's just the facts of their respective appearances. If you don't like that, then complain to the directors that decided Matt would be left exhausted and bleeding by fighting a bunch of biker gang punks, while Natasha can do the same to commandos without taking serious injury.
This is not a question of me disagreeing with directors choices - although you would be surprised how tough bikers can be, and now that you mention it, Black Widow dropping a bunch of Crossbones' or Batroc's or Hydra's thugs ( let's face it, the thugs in A of U, were pretty useless, even the killer robot thugs) with a single kick or throw is rather unrealistic...well she does that until the plot needs her to struggle for the purpose of suspense e.g. Civil War in the market scene.
Anyway. I'm relying on 1) Matt's performance against Ninjas, who IMHO are top shelf quality mooks, a cut above even Crossbones' or Batroc's mercs. I give Widow points for beating up aliens though, although not really using hand to hand ( mostly guns and tasers).
AND
2) Matt's performance against Elektra - who I still
believe could beat Widow in straight up hand to hand or with melee weapons.
3) While the basis of your comparison is indicative ( person A can beat person B because person C more easily) it isn't perfect - in part because it's tough to compare anonymous thug characters, because we operate on a lot of assumptions, e.g. we assume the Crossbones' mercs have military level competence in hand to hand - because we're talking about hand to hand here, and at the same time that the Bikers don't. ( if we're being realistic, in some ways bikers could be tougher in a fist fight as at least some of them would be high on meth, good luck punching them then).
Another part of this issue, as I alluded to before, mooks and goons serve a particular story purpose, they're cannon fodder for the hero characters. As such, hero characters are pretty much always going to beat them. I mean that Widow took on a small horde of Chitauri ( or dropped larger men with a single kick in Civil War) seems ludicrous, but the story needed it to happen so.....
The problem with Widow is that we don't see her take on anyone who is of relative skill and still regular human - she really exists to clear a path through anonymous henchmen. She seems to be able to defeat Hawkeye, but it's hard to say if either of them are really trying when they fight.
If we had onscreen evidence of Widow vs Elektra, Widow vs the Dora Milaje, or Widow vs someone ( other than Clint) with a high level of physical skill but still human, that would be a better basis for comparison. We do see her fight Rumlow, who has a bunch of gadgets and some serious scarring, and he beats her down pretty quickly.
Anyway, the poll will decide. Salut!
She's pretty much the gold standard for "non-enhanced martial artists" in the MCU currently.
