Nah he did. Unfortunately he isn't required to diffuse the situation, isn't required to stop and take stock or retreat. His job is to use deadly force when he feels his life is in danger. Yeah he got fired so there is that. But police are taught to save their own lives even if it means killing others.
I have no issues with a critical piece as long as it's grounded in reality and sticks to the facts, and for some reason I feel it's especially refreshing if I were to see it on the team's actual site.