There are many antonyms for the phrase "did bit," which means to do something small or insignificant. One such antonym is "accomplished," which implies that a great deal of work has been completed. Other antonyms include "achieved," "fulfilled," "succeeded," and "attained," all of which suggest a level of success, accomplishment, or fulfillment that is beyond the scope of the phrase "did bit." These antonyms highlight the importance of setting goals, working hard, and striving for greatness, and they remind us that there is always room for growth and improvement in our lives.