At the league banquet, the loser rises, raises a glass, and delivers a formal, sincere toast to the champion, cataloguing their own failures point by point. Written in advance, subject to league edits. Short and dignified is not permitted.
Budget note: this one costs nothing but dignity, which makes it a strong pick for leagues that would rather spend the pot on the champion than on the loser's downfall.
Seen in the wild: scoutcast.ai