high-performer has become... very difficult after lack of promotion
I've made plenty of mistakes in this situation, I'll admit. But right now I have a high-performing direct report who was passed over for promotion. (Mistake 1: I told them to expect a promotion... and found myself angered, belittled and shocked with how things played out.)
In the year-end evaluation I provided, I told them to simply keep doing what they've been doing. And that I felt they were on track for a promotion in the next round. I couldn't offer insight into what (i.e. who) blocked the promo (mistake 2).
He then clapped back with, "What I've been doing clearly hasn't worked out for me even if it's worked out for you. I've fallen behind my peers by two years in just two year's time."
He is correct. But the problem was that he asserted, "I have no choice but to guess what they potential issue may be and then make changes accordingly, so you will notice a change in behavior. There will be no negotiations about that."
Since, he's been extremely difficult. Outspoken. Speaking out of turn for his level. Slowing down work. Pushing back. Delivering lower quality work. Demanding high-profile work. And I just don't know how to reign him back in.
Any advice?