bane of one's existence

Noun

idiomatic

(idiomatic) Something or someone who poses a significant problem to an individual.

Japanese Meaning

ある人にとって絶えず問題を引き起こす存在 / その人にとっての悩みの種・災厄 / 非常に厄介な存在

For many new parents, sleep deprivation is the bane of one's existence.

多くの新米の親にとって、睡眠不足は生活の大きな悩みだ。

Sense（1）

(idiomatic) Something or someone who poses a significant problem to an individual.

banes of one's existence

（ plural ）