I keep seeing fans claim that Stede beat Izzy in the duel. No. Stede won the duel on a technicality because Izzy's sword broke, but he didn't beat Izzy at swordplay. If anyone/anything beat Izzy in the duel, it was the Revenge itself because Izzy's sword jammed in the mast. In fact, I'd argue that Izzy defeated himself because he got so agitated trying to retrieve his sword that he pulled on the sword hilt too hard and broke it himself.