The phrase "do injustice to" is often used to describe a situation where something or someone is not treated fairly, or their worth or value is not fully recognized. Some possible antonyms for this phrase include "do justice to," "give credit to," "acknowledge," "value," "appreciate," "honor," "respect," and "treat fairly." By using these words instead of "do injustice to," you can convey a more positive and appreciative tone, and express a sense of recognition or validation for the person, idea, or object in question. It is always important to use language that conveys positivity, respect and appreciation towards others.