Not just the final duel…perhaps you forgot he killed someone as well?
You didn’t believe in him as a main villain, but plenty of people did.
He killed someone, but that was at the end of the film too. I didn’t like his character at all, regardless of villainy. I was actually kind of annoyed by him.
I guess you forgot about Lor San Tekka, who he killed right at the beginning of the film.