There are several synonyms for the phrase "didst something about it." Some of the commonly used alternatives include taking action, responding, addressing, resolving, dealing with, tackling, managing, handling, and coping with. These synonyms suggest the act of taking ownership of a situation and actively engaging with it. They imply a sense of responsibility and accountability for one's actions and suggest a proactive attitude towards dealing with problems. Using these synonyms can help to add depth and specificity to your language and communicate a sense of agency and effectiveness in your actions. Whether you are writing about personal experiences or business situations, using these synonyms can help you convey a message of competence and confidence.