@FrozenToothpaste I disagree - yes, if he were a proper fighter, or the cause of his fight a neutral one, this style would have been shameful, but don't forget, he still wears the "disguise" of someone who is neither at full strenght nor has much fighting experience (basically his 12 year old self)
you can argue if under these circumstances he should have accepted the duel in the first place - but while I am against the "let's just kill all villains" some people here are heavily for, I am for an eye for an eye, especially in all cases where the outcome is not irreversible (even in its origin the bible, it was exactly not meant as justifying revenge, but rather giving fitting punishment an eye for an eye - yes but not more, not you robbed my eye now I can kill you, that would be a live for an eye...)