Lets not confuse quiet professionalism with submission and passivity.
That guy was coordinating large amount people in high stress situation. If he would allow everyone to walk on him, lie about him and would not be able with people full of BS, the whole operation would had likely failed.
Well Unsworth had behind him many years of experience diving in these caves and had been instrumental to locating the children and the rescue operation.
Can't blame him for his outburst at Musk's PR stunt