Jamie Dimon said insecurity can ruin CEOs. Here's how to spot a fragile ego hiding behind confidence.

Jamie Dimon Bloomberg/Getty Images The JPMorgan Chase boss warned that a lack of confidence can torpedo a CEO's career. Micromanaging, rejecting dissent, and chasing credit can weaken teams and drive away talent. Executive coaches explain how leaders can replace defensive habits with curiosity and trust. Insecure CEOs may not recognize their own behavior — or realize how much it is hurting them. Jamie Dimon recently said a lack of self-confidence can sink a leader's career by disconnecting…