The phrase "gave comeuppance" implies that someone is getting what they deserve, typically as a form of punishment or retribution. If we were to look for antonyms to this phrase, we would be seeking words or phrases that suggest forgiveness, pardon or mercy. Some potential antonyms could include "let off the hook," "showed leniency," "spared the consequences," "looked the other way," or "turned a blind eye." These phrases each suggest a sense of forgiveness or lack of justice, and they can be contrasted with the idea of someone receiving their just deserts in the form of a comeuppance.