Performed poorly is a phrase that describes a lackluster or subpar performance. However, there are many synonyms for this phrase that can add depth and variety to your writing. Some synonyms for performed poorly include performed inadequately, did badly, fell short, underachieved, missed the mark, failed to meet expectations, and performed unsatisfactorily. These synonyms can help you communicate your message more effectively by providing more nuance and specificity. Using different synonyms can also help avoid repetition and make your writing more engaging to the reader.