When we say someone "did justice to" something, we mean they performed a task or enjoyed something to the fullest possible extent. Antonyms for this expression include "fell short of" or "failed to live up to." These words suggest that someone did not give something their best effort or did not appreciate it fully. Other antonyms might include "ignored," "overlooked," or "disregarded," indicating that someone did not pay enough attention to something or did not give it the respect it deserved. In contrast, synonyms for "did justice to" include "honored," "cherished," or "appreciated," indicating a high level of respect and admiration towards something or someone.