We are constantly told that finding a great mentor is the ultimate shortcut to professional success. But what happens when the person who guided you up the ladder suddenly becomes the ceiling holding you down? This unspoken career trap is silently stifling the potential of countless top performers across every industry. The hidden danger lies in a psychological phenomenon known as the Pygmalion Plateau. Mentors often unconsciously freeze their proteges in the exact developmental stage where they first met. As you grow and evolve, their mental model of you remains static, leading them to subconsciously block your advancement to protect their own ego and maintain the original power dynamic. This comprehensive guide dismantles the romanticized myth of the lifelong mentor. It reveals the subtle, passive-aggressive signs that your champion has turned into your gatekeeper, explaining the complex emotional friction that occurs when the student is finally ready to surpass the teacher. Reclaim the trajectory of your own career without burning vital bridges. Discover actionable strategies to gracefully exit outgrown professional relationships, transition from a subordinate to a peer, and build a dynamic network of sponsors rather than clinging to a single savior.