If you can't figure out how to coordinate one person on your team interrupting/stunning/fearing/incapping/trapping/etc a target in PVP during a damage cooldown I'm afraid there isn't much hope for you.
It's comically easy to counter through multiple avenues available to every class. However if that is too much for you I'd suggest trying out a holy paladin. Just roll your face on an assortment of instant cast buttons and you'll be fine. It's probably more your speed.