I feel like some kids are ok to play with. Im sure you're fine. People like hating on each other. Dont give up playing dude! Just throw it right back at them. When I was 12 I raided in 40 man groups as main tank and coordinated all the other tanks. When I yelled at people in my "squeeker" voice people shut up and paid attention. Age doesnt mean a thing if your mature. My advice is to start your own groups, be a leader, and dont take crap from anyone who wants to hate on you for the sole reason of being young (and stay in school so you don't end up in a job like the people hating on you because they messed up in life and regret where they ended up :-) ).