Mourinho and Van Gaal!! Really. I am sure they have won things in England. I also remember Alex Ferguson absolutely slaughtering the Aberdeen players on TV straight after a match at Hampden Park to the extent that he had lost it. Aberdeen had minutes before just won the Scottish Cup.Hes not won anything in England yet and even that aggressiveness can backfire in the modern game - see Mourinho or Van Gaal.
We have a manager who is honest and open and tells it how it is. We now know his thoughts and are not 2nd guessing. He is like reading a match report in the paper....not holding back and more importantly its his opinion that counts. The players mettle will either make them become better players with criticism from the man that matters or will shrink away like a child. Koeman is the iron rod whilst the other coaches/staff can have kind words for the weaker players.