do (someone or something) an injustice

idiom

: to treat (someone or something) in an unfair way

They did her a great/terrible/grave injustice by not allowing her to file a complaint.

I think you do the book an injustice when you call it "trash."

Examples of do (someone or something) an injustice in a Sentence

Recent Examples on the Web

But to embark on another U.S.-troop-centric counterinsurgency mission would do an injustice to the fine men and women who serve in the U.S. military. —James F. Jeffrey, Foreign Affairs, 16 Feb. 2015

But that would do an injustice to the amazing performances and the razor-sharp writing, which propels the story with such nonstop momentum. —Bill Goodykoontz, The Arizona Republic, 1 Sep. 2021