The phrase "unhappy family" refers to a group of people who are not pleased or satisfied with each other, causing discomfort or sadness within the family. Full definition
Within 48 hours I was dealing with one very unhappy family member whose PIN code no longer worked. (digitaltrends.com)
I spend most of my working week with happy and unhappy families alike, and they're all unique. (verilymag.com)
Finding solace at the bottom of a beer pitcher, Tommy takes a room above his favourite bar, Trees Lounge, where he takes to drinking with unhappy family man Mike (Boone Jr). (bbc.co.uk)