百ひゃく害がいあって一いち利りなし

expression

all pain, no gain; doing no good and a lot of harm; having no redeeming features

Idiomatic expression meaning something brings only harm and no benefit. Often used to criticize an action or thing as completely disadvantageous.

• そんな計けい画かくは百ひゃく害がいあって一いち利りなしだ。

  That plan will do nothing but harm.

• タバコは百ひゃく害がいあって一いち利りなしと言いわれる。

  It is said that smoking has no benefits and only causes harm.