Napoleon defeated Waterloo, Guan Yu defeated Maicheng, and Xiang Yu committed suicide in Wujiang River, which is more regrettable?

All three have regrets. The so-called regret is pity, sympathy or regret. Compared with Guan Yu and Xiang Yu in China, although the defeat and suicide of Maicheng were all caused by personal pride, whether Guan Yu achieved the imperial career fell short, and Guan Yu was only a border official of Shu (and a place where his brother refused to return it), which was suspected of breach of contract. As for Napoleon I, who was king in France, it is normal to lose in the encirclement and suppression of the feudal imperial alliance. This kind of military commander-in-chief won or lost is a common occurrence, and it is not comparable to the two at home.