Healing?

So I've spent the last few weeks levelling my priest, and trying out healing.
I didn't realise the amount of crap that healers actually have to put up with.. seems like everything that can go wrong in a dungeon is blamed on the heals. For some reason I just got called a "fail healer" at the end of what I thought was a good heroic run.. everyone remained at top health throughout the dungeon, no deaths, so how did I fail at doing what I was meant to do: keep people alive? Healer has aggro and can't heal, it's their own fault. Healer is feared or stunned, their fault. Of course I don't deny I make mistakes, but this really annoys me when it clearly is not the healers fault! So I'll be sticking with my Hunter as my main, as healing is definitely not good for a person with a short fuse like mine!