UFC doesn't have the smartest fan base.
They hated Anderson when Dana was bashing him and he wasn't finishing fights the way they wanted him to.
Then they loved Anderson when Dana started praising him and he started finishing fights the way they wanted him to.
That's the nature of the UFC beast and it's impressionable fan base. If you're making Dana White money, he will get the fans to like you, if you're not making him money, he will get the UFC fans to hate you.
Can you really blame anyone for hating Anderson after the Leites and Maia fights? I don't think Dana had anything to do with fans being pissed after those fights