You paid a bunch of tokens and it's late in the season, if you have any easy games, try playing him out of position, or on the other side from where he is now; or with different orders, if he has an arrow, get rid of it, and see if he doesn't show any life. Look at his skill point allocation, if there's not enough points on "creativity" they don't apply their other skills well.

Also, always make sure morale and condition are high before match start.


If none of that works, sell him.