It's frustrating, for me he had a lot of potential we saw glimpses of in his first season. GIven such limited game time does not lend to his cause now, its very easy to build up a perception of how awful he is when we see him for 20 minute cameos when a game is over.
He obviously has confidence, but he has no testicular fortitude as soon as he makes 1 mistake, just cowers afterwards. Frustrated for him that he didn't get another good run in the side - it worked for him before and we saw glimpses.
I guess when you compare his attitude away from the pitch next to Mkhi who in the space of 2 (or 3?) months, got his head down, accepted his faults and now is flourishing.. its another mark against him.
If he doesn't want to be here, hope we get rid ASAP. hundreds of young guys in his position who would die for a chance to grow in our club and under Mourinho.