I think a big part of the problem during his time here was his grasp of the English language.
They don't speak much English there in Turkey do they ? He's gonna come back more confused.
Apparently the word 'sick' in Turkish means *uck in English. 'Um' = *unt. 'Peach' = Bastard.
So imagine if returns to play for us and he makes a great pass, and everyone runs to him to congratulate him - 'Marko, that was sick yo !'
He'd have thought they were cursing him. 'Marko, that was a peach !'......In Marko's shattered fragile mind, 'Marko you bastard !'
Milner - 'Um, Marko, that was a peach of a sick pass!'
Poor Marko's mind - '*unt Marko ! You bastard ! *uck !!'
He's gonna break down crying the poor lad.