Eh, I am not a child, though my experiences with fighting games are limited.
No one in my ( admittedly small ) guilty gear scene has any problems with tiers, and I have been playing Melee competitively since 2008, and I never hear anyone seriously bitching about the extremely 'gay' things you can do with certain characters in that game. I suppose when you are playing the same game that has been out since 2001 people don't whine/bitch/moan after years and years and years.