This statement has to be one of the most lazy, thoughtless cliches in all of sports fandom. Just because fans want their team to improve or because they criticize moves or the lack thereof does not make those fans "spoiled." It makes them passionate. That's the definition of being a fan.
I think the term fan comes from the word fanatic.
apersonwithanextremeanduncriticalenthusiasmorzeal,asin religion or politics.