The Scottish league is one where teams outside of Rangers and Celtic are full of players who would be better suited to playing rugby than football and refs who let players away with dreadful challenges. Not to mention that a quarter of the league plays on plastic pitches that are barely better than your local 5-a-side.
Maybe/hopefully he'll take a new job at Juventus. Seems odd to come to hold a press conference at Juve stadium just to announce that you are retiring imo.