This is not a problem at all when you consider only polearms and 2h, but when you do it shielder vs a polearm-spamming, backpedalling and kick-spamming douchebag, it sure feels broken.
Furthermore, what is important is not the lack of skill required to lose against such a stupid "playstyle" in a duel, it's the even lower amount of skill needed to actually do it correctly, in any game mode.