What do you do when your top performer is also your team’s biggest problem—when they’re smart, driven and effective, but also dismissive, manipulative and downright destructive? On one hand, they’re your superstar. On the other, their toxic behavior builds quiet resentment, leads to rising tension and damages morale in the team. Confrontation is hard, but your job isn’t just to chase performance, but to also draw a line between excellence and harm. It’s to set clear boundaries, ma...
