You must have been asleep during the mid-2000s when he hit .258, .133, .071 and .267 in four consecutive series where the Yanks were eliminated in each one. He was awful and then he was terrible again in 2010 onward. He had one good year, postseason wise, 2009.
Most NYY fans I know were not big fans of ARod. His postseason droughts were instrumental in several early exits and the $$$ he was stealing from the Yanks later in his career put the team in a spot where they couldn't address other needs because of all of the money devoted to ARod.
As far as forgiving fans that's questionable. Stanton was getting booed right out of the gate this year.