You can't just keep swinging at a guy hoping that one shot is going to kill him, it doesn't work. If you are fighting a guy with another two handed weapon and you try that, then he's just going to step back and chop you across the head and one shot you as you try and chamber again.
That being said, if you facehug a guy with a shield and just keep swinging, he's going to die 90% of the time, at least from what I've seen. It's because 2 handed weapons are flawed. If you tried that in reality you would be blocked and stabbed in the gut. What needs to be done is either slow down the swing speed of the two handed weapons or make it so if they are blocked there is a knock back effect, to prevent people from aimlessly swinging and owning sword and board users.
However, all these guys running around with no shield out is free meat if you play as an archer <.<