This is Snyder Cut's Steppenwolf vs. Thanos. Steppenwolf has his axe, Thanos has his sword. Both are fully armored. Thanos doesn't get any infinity stones.
Who'd win a straight up melee fight in the fields of Themyscira?
__________________ "Happiness is a lie. Life is horror. The light is always dying all across the universe. The last star will flicker out someday, when it does, all that remains is shadow. And I will be its king!"'-Amahl Farouk
But an argument can be made for some to scale SW's speed from WW.
I won't (i say WW wasn't using her full speed against him) and therefore Thanos stomps.