He's not all there, quite possibly the dumbest player I've ever seen. He launched into that 2 footed tackle and then looked surprised when he was sent off.
To be fair, he did come on for them in the win against Brighton a couple of weeks ago and managed to stay on the pitch so it wasn't strictly his debut.. shame really, he's a talented lad underneath all the red mist
But there a whole list of the players that dont reach their potential, for various reasons. Some conquer their demons, others for lack of mental fortitude, or the right people close to them, fall. Rooney is a good example, of the red mist descending. I think it is to do with the backround of some of the players, and the wealth that is thrown at them at such an early age, some cant adapt.
Its not even red mist, he's just stupid, you can see Rooney getting wound up but diakite is mental from the start of a game without getting angry.