The phrase "didst wonders" implies an incredible feat or accomplishment, so antonyms could include words that suggest failure, disappointment, or mediocrity. Some examples might include "faltered," "disappointed," "underperformed," or "failed to impress." Other antonyms might focus on the idea of doing nothing spectacular or memorable, such as "averaged," "performed adequately," or "did the minimum required." Overall, the antonyms for "didst wonders" suggest a lack of exceptionalism or a failure to live up to a high standard of performance.