Like... was this fight supposed to be the End Boss? Because unless it was, I don't think it matters. It was a basic skill check to get a cool sword. Chill out. You only have to do it once, and then you never have to go back to it.
There are much worse boss fights in this game, and once you have to do over and over to get things that aren't as useful as a Large Sword of Glassy Doom.