Antonyms for the phrase "patched things up" can include phrases such as "fell out," "had a falling out," "alienated," "separated," or "disengaged." These phrases represent a fracture or distance between two parties, rather than a resolution or reconciliation. They indicate that there has been no effort made towards understanding and communication, and that the situation may have deteriorated beyond repair. These antonyms emphasize the importance of addressing conflict and finding common ground, rather than allowing disagreement to push people apart. While "patching things up" may require effort and compromise, the alternative can lead to long-term damage and personal estrangement.