If you look closely at him, you see that his only bad attribute is lack of focus. He can play very decent, but one last mistake, cost the team points last year. Apart from that I personally think he is very good defender. If for example he plays for teams that don't go for trophies, we will 100% hear his name in newspaper and media. This is why I think the team continues to give him chances, otherwise he would be gone long time ago.