The antonyms for the phrase "did what is expected" could include terms like disappointing, underperforming, lacking, or failing to deliver. These words imply a sense of falling short or not meeting the desired standards or goals. Other antonyms may include noncompliant, rebellious, or wayward, suggesting a willful defiance of expectations. In contrast, synonyms for "did what is expected" may include concepts such as meeting expectations, fulfilling duties, or completing tasks satisfactorily. Whether discussing academic or professional performance, personal relationships, or other types of expectations, there are usually varying degrees of success and failure that can be categorized by different antonyms and synonyms.