One activity that can spoil family relationships is constant criticism. When one family member is constantly criticizing and belittling others, it can create a toxic and negative environment within the family. This can lead to resentment, hurt feelings, and a breakdown in communication. Over time, the constant criticism can erode trust and create a rift between family members, causing long-lasting damage to the relationships within the family. It is important to address and work through any issues that may be causing criticism in order to maintain a healthy and happy family dynamic.