I don't think that is fair. I have seen criticism of him in games where I thought he did well but he had become a fashionable scapegoat.Come on, these weren't isolated bad games or mistakes - he's been poor for 3 seasons now. We're all made up that there's finally been a big improvement in past few weeks but let's not go rewriting history.
Three years ago he was a nineteen year old boy, maybe a trifle early to be deciding on how good he was or was ever going to be.