Unhealthy and unjustified unhappiness
She wasn't happy. Not because she was suffering (agonizing), dying, grieving, crying, wrangling. Not because she was leading trouble-free life. She loved it. The only one thing she couldn't stand was immutable routine. She hated renouncing anything. She didn't like buzzing behind the wall, but after all it was not that kind of not liking on her mind.
When she finally came back home, someone whispered to her that she was destroying others lives. She asked why. She only found out that she was poisoning wellbeing of others by unhealthy and unjustified unhappiness.