According to report his contract has been terminated due to a series of problems some of which are football related and others which are not. Last year he was convicted of drink-driving and his two loan spells - at tranmere and oxford - ended with him being sent back early to utd due to problems with discipline. For instance at tranmere he was sent back cause he didn't turn up for training.
I wouldn't even hazard a guess as to why someone I don't know acts the way they do. I'll leave that to the abus who seem to be blessed with wondrous powers of deduction that go beyond the normal range of human ability when it comes to anything that shows utd in a bad light. But on second thoughts their ramblings are usually the product of a overactive imagination fuelled by their hatred of the club and its success.