But now Arts Beat has shed some light on what exactly caused him to quit the band, and it's pathetic.
In the statement, Mr. Gallagher, the group’s lead guitarist and main songwriter, said that he had been “forced to leave” Oasis, adding that “the level of verbal and violent intimidation towards me, my family, friends and comrades has become intolerable” and “the lack of support and understanding from my management and band mates” left him with no other option.
So, yeah. He quit because he was scared of his bandmates and unable/willing to stand up for himself. God, 1997 Noel Gallagher would have beaten the shit out of 2009 Noel Gallagher.