Haha, yeah I get those people, too. I have a team specifically designed to counter uber teams. The funny thing is, it's a UU team. Also, defensive parahax Jirachi is annoying.
Lately I've been using a team based on a sun-boosted Venusaur sweep with a Crobat stall/wallbreaker, Venusaur pretty much destroys most peoples teams by itself on random wi-fi.