Why was the 12 year old being picked on?
^^This is what I'd like to know before I call the "bullies" out.
In order for us to be more sympathetic, I'd like to know the story. What was the kid doing? Were the people simply offering advice on how to play and someone got sensitive about it? How exactly were they "picking on" this kid?
It's easy to come on the forums and say people were being mean, but OP, you have not told me anything. Besides, if these guys were jerks as you say, isn't it best that you don't play together? Simply put them on ignore. I'm not sure why you were upset about being kicked from the group when maybe you should be upset about the bullying. But your title "Kicking these days are getting pretty bad" tells me that is what upset you most, not their attitude.