He didnt use his power properly. His skill was to duplicate items. And he became a swordsmen. That’s stupid, as his skill does not actively help him with that. What he should do at all times is use strong one time use items and spam them all the time and be a tank to not die while doing it. Every other way of playing just helps him passively with his ability and not actively. Like for example, through a bomb and then duplicate it shortly before throwing and bam, he through 10,000 bombs at his enemies. And the writer is a little to nationalistic