underachievement

noun

achieve less than some benchmark

Wiktionary

noun

Etymology: Etymology tree Proto-Indo-European *h₁én Proto-Indo-European *h₁entér Proto-Indo-European *(H)n̥dʰí Proto-Indo-European *-ér Proto-Indo-European *(H)n̥dʰér Proto-Germanic *under Proto-West Germanic *undar Old English under- Middle English under- English under- English achievement English underachievement From under- + achievement.

An achievement that is less than expected; underperformance.
“This underachievement is linked to a laddish culture […]”