True but he was very efficient in his use of Mett-tsl.Cantankerous mostly.
And antithetical to popular venerations of him, so common in today’s milieu; but Sun Tzu was a punk, all the same.
The guy killed without remorse, pretty much like a psychopath would do. It is one thing to be a good fighter, and a great general, but it is another to be a cold blooded killer. That is something that no one should be: and he killed the innocent, when he murdered the concubines.