tbf, it's too specialized. They're heavy so they can hurt through armor, which makes them slow. Terrible weapon vs an unarmored opponent, who can more easily just get out of the way or stay out of your reach.
A spear is at least good everywhere but indoors.
Like, what is the absolute last medieval weapon you would ever want if you were fighting 3 unarmed guys? All fast, all know what they're doing. I'd say mace is solidly last.
Now, are they all wearing heavy plate armor like knights? Then mace becomes really, really good, it'll break your bones through that steel, dent the steel inward so it compresses your body and the joints stop working properly, all sorts of shitty things. And you're too slow to get out of the way.
source: I like maces.