I think it's just more so that he doesn't really want to be an AFL footballer. Some people are blessed with talents that they don't really want to have - it doesn't mean that they have a terrible attitude as such, it just means that they don't love what they do.
Sitting out a year of Football because you want to play for a different club, despite being paid over 400k, IS a horrific attitude.
Any young kid on that huge salary should just ******* play out the year and get a trade at the end.