The Avatar before Aang was Roku, so there have been times ... Seven Havens broke some in-universe rule by making the Avatar a girl. They’re angry that the Avatar is female, period.
Avatar: The Last Airbender made its mark on pop culture as fans still rage on about the superiority of Aang over his ...
Avatar: The Legend of Korra might have cued fans in about a key curse that follows they Avatar through it's reincarnations.