He's currently at a better side and earning more money than he was at Sunderland (granted not much better). Fpr someone with no Sunderland links he did the natural thing. He would also have felt justified because he did his job for you and saved you from relegation.
He owed us a lot more, without us his career was literally down the bog, he could've left at a more suitable time as well. He's a prick.
