Yes Seol was a serious disappointment.
The views on this site are not just based on this one game. A pattern has emerged which has convinced most people that Seol cannot be arsed. He gives the impression, rightly or wrongly, that he cannot be bothered to chase back or beat his man anymore. After the stunning start to the season he has gone off the boil just as he did with Wolves.
Presumably he has a three year contract and is sitting pretty so don't expect him to be moving on in a hurry.