All families have disagreements. Sometimes people are tired or stressed. Sometimes they hold things inside to spare another person's feelings. That winds up causing a person to feel resentment and anger. In order to communicate clearly, families have to set aside the time.
Some families use mealtime as the time to talk.
Others set up a weekly time to air their issues together. During this time, the phone is not answered, and the TV is off. Family members try to listen without judging, share their feelings, and approach problems with an open mind. Effective communicators don't put down others. This makes it safe to speak openly.