Blind your eyes to petty criticism. His church was a murmuring people. He did get disgusted. He struck the rock and disobeyed God, but his patience had worn thin. He had had enough.
Petty criticism wears on the leader.
The wise leader will work hard at blinding his or her eyes to the pettiness of church members' criticism. If that doesn't work, he outlasts them. Nobody said it would be easy. Bind the ties of love and courage. Today's nomenclature calls it tough love.