"I have been going out of my way to show appreciation and try to make them want to be more engaged, but I am not seeing any improvements."
If you are so busy dealing with problems that you have no mind-space or energy left to keep your high performers engaged and fulfilled, you are missing out on your biggest opportunity.
Qualities in excess tend to create problems, concerns about other people’s opinions can lead you in the wrong direction, and adapting your behavior to influence people’s perception of you makes you look dishonest.
I sincerely believe that the majority of employees who don’t meet their supervisors’ expectations don’t know how to improve but would love to be empowered to succeed. And they deserve your attention!