When you have critical feedback, don’t speak behind the person’s back.
Have the guts to say it to his face.
Front on. In the belly.
It may be unpleasant, but it’s cleaner. And faster.
And it engenders trust.
People might not like your direct feedback, but they’ll respect your upfront-ness.
Speaking behind people’s backs doesn’t change behavior, nor does it create trust.
Give it in the belly, not the back.