You could always create your own group. I don't think there is a way to rename existing groups. (If there were, a lot of spelling mistakes in group names could be corrected.)

As I understand it, "groups" on EP are called experiences. One experience many of us have is that we hate being yelled at. It doesn't matter whether everyone hates being yelled at or if only some people hate being yelled at. The group/experience is a place to talk about hating to be yelled at.