xìng​zāi​lè​huò

Schadenfreude

幸灾乐祸 (幸災樂禍) xìng​zāi​lè​huò
Schadenfreude idiom
to take pleasure in the misfortune or trouble of others

We should not gloat when others encounter difficulties.

Frequency

Movie subtitles
2.33 per million appears in 1% of films
Written text
1.68 per million

Sources

Definitions
CC-CEDICT