Say the Hard Thing
randsinrepose.com
randsinrepose.com
The problem is, as the author notes, the longer you let the behavior go, the harder it is to correct it. When I worked at the Coast Guard, we had an abrasive personality who simply shot down everyone else's ideas. Management's solution was to establish a rule that you could not criticize a proposal without offering a solution. Suddenly that abrasive individual started looking really silly blinking dumbly when they were asked, "So you've identified a problem. What's the solution?"