Antonyms for the phrase "set to rights" include leaving things as they are, ignoring the problem, exacerbating the issue, or making things worse. It's also possible to use the phrase "set to lefts" to suggest the opposite action of setting things right - this could include deliberately causing problems, refusing to take responsibility, or avoiding any action that might help the situation. Other antonyms for "set to rights" might include leaving things half-done, making a bad situation worse, or simply denying that there is any problem at all. Ultimately, the choice of antonym will depend on the context and the tone of the conversation or message.