There are several synonyms that can be used in place of the phrase "didst injustice to". These include: wronged, mistreated, harmed, injured, damaged, hurt, unjustly treated, ill-treated, offended, insulted, and violated. Each of these words conveys a sense of wrongdoing or harm inflicted upon someone, either intentionally or unintentionally. They can be used in various contexts, from personal relationships to legal situations. When choosing the right synonym for "didst injustice to", it's important to consider the tone and message you want to convey, as well as the level of severity of the harm inflicted.