By the time she was in her late twenties, Tara Schuster was a rising TV executive who had worked for The Daily Show with Jon Stewart and helped launch Key & Peele to viral superstardom. By all appearances, she had mastered being a grown-up. But beneath that veneer of success, she was a chronically anxious, self-medicating mess. No one knew that her road to adulthood had been paved with depression, anxiety, and shame, owing in large part to her minimally...