Why does everyone say Riot's customer service is so bad?

Having played many other MMOs, I can safely say Riot has the best customer service yet. I submitted a ticket yesterday about a glitched free alistar through youtube subscription. My ticket was closed WITHIN TWENTY FOUR HOURS. That is almost unheard of. Blizzard takes almost a week to respond to its tickets. Nexon used to take nearly a year (they still let you wait several weeks) for one response. Seriously.

Not only that, but my ticket was personalized instead of the generic Comcast "Thank you, have a nice day". It was obvious the person had looked through my account with the comments he left.

What I don't understand is why many people say Riot's customer service is bad. I guess it's all perspective: if you've never had any negative experiences with customer support, then you're more apt to label it as bad. Just want to say great job Riot for your excellent customer service.