Why won't Davy ever admit he got his tactics wrong ..

It was abundantly clear to most people by half time that the formation/tactics needed to be changed. Apart from Van Homoet instead of Kozzie, I had no problem with the starting line up.Why Davy waits while the 65th minute before deciding to change things is beyond comtemplation in my opinion. By this time Charlton had grown so much in confidence that they were actually taking the game to us and looking for the winner.
I'm not of the Davy out brigade, but he never seems to learn from his mistakes. I believe this will eventually lead to his downfall, and ruin his reputation of an up & coming manager.