I am reading a friend's book that's still in proofs, so I'm not going to talk about it yet.
But there is one part of the book that really rang true for me, and it's when he talks about certain kinds of problematic employees, particularly one he calls "the Heretic."
This kind of employee, and we have all seen this up close, is negative about the company and disses the management, co-workers, the board, the strategy, the workplace, and everything else under the sun. But, for some reason, the heretic prefers to stay and be miserable than to move on and find another place to work that is more to their liking.
My friend states in his book that you have to part ways with heretics in your company, regardless of how talented they are, how connected they are, and even if they are protected in some way. You have to find a way out of the heretic mess.
I agree with this advice and I have seen this play out in many ways. The worst way is to let this behavior go on unchecked. As painful as parting can be, and it can be incredibly painful depending on the circumstances, letting this behavior stand is worse.