Your 'original' joke may have been funny two year ago when some bloke was making a sharp exit from the Brandywell.
But frankly I find it offensive. Higgsy is a gent, and if he says its personal reasons then you can believe it. Despite your apparent knowledge of everything, I believe you to be ignorant of many facts in this case - including, seemingly, the high regard which many Derry supporters still have for the man.