That half time substitution isn't being talked about enough. So two goals down, he removed Telles, his full back with the best potential in attack, knowing fully well that Shaw, a full back with a worse potential most likely wouldn't last the game anyway. Then a few minutes later he removed Shaw and brought on Williams. So he basically used two subs to remove his two main left backs, just to get his third choice left back on the pitch.
He has always come across as a dumb one to me, but I hope he made that sub because Telles had a problem. Otherwise I fear for this football club.