If anything this whole situation just shows how fickle "casual MMA fans are". A guy show some talent as an up-and-comer... people cheer him on. Then he actually achieves success and people vilify him. Or they like a fighter until they beat up fighters than the "casual fan" liked when he was a kid. Or the young fighter shows some confidence (which you need to succeed) and suddenly he's "too damn cocky".
I think all of this just shows how flaky some "fans" are.