As millennials surpass Generation X as the largest cohort in managerial roles, many confront unprecedented burnout fueled by heightened expectations from younger Gen Z subordinates and a lack of leadership training. Interviews with millennial managers across sectors reveal personal and professional strains, with some experiencing panic attacks and high stress. These leaders strive to cultivate empathy and flexibility but face a crisis of mentorship and workload balance. The phenomenon reflects wider generational challenges in workforce wellness and evolving workplace dynamics, emphasizing the need for improved management support and mental health resources.