To do justice to something means to give it the attention, respect, or credit it deserves. Therefore, the antonyms for "doth an injustice to" are word combinations that reflect a lack of attention, respect, or misrepresentation of something. Some antonyms that come to mind include: to overlook, to downplay, to belittle, to disrespect, to ignore, to devalue, to discredit, to underestimate, and to underestimate. Using antonyms of "doth an injustice to" could help you accurately describe situations where something, someone, or a situation has been ignored or undervalued, and thus you can use them to express your thoughts or feelings more accurately.