Hi! I would like to hear your advice on the following.

My most valuable player (15,5 M) is a 19 year old 55 MC. I bought him around last season's half.

Can't understand why, but he always plays awfully, usually getting 5s, even 4s and very rarely 6s. I gave him some time to settle in and constant morale boosters, buy it's getting ridiculous.

Should I sell him? Is there anything else to do?

Thank you!