His 'situational' management is woeful. He doesn't react to obvious failings in games. Rinse and repeat subs on 60 and 70 minutes.
His dogged reliance on the 'system' to work, even when it clearly isn't working (in certain games at certain times) shows his 'management' of the team, tactics and his 'men' is clearly very poor.
He may have astounding conversations and bonding sessions with the players about hair products and fashion styles, but that desn't make a good football manager!