I've ran this dungeon a ton so far as a tank. Not once in all my runs has a dps died, during boss fights or during large packs. There is not a single place in this dungeon where you, as a ranged caster, could not be far enough away to avoid the AoE's. Even if both gorillas aimed their cannons at you at the exact same time you should be able to live at your ilvl. For that part it sounds like you were bad, just accept that.
I would've kicked you too. Mind you, I would've spoke to you first, but chances are you'd have been kicked. To die twice in quick succession as someone who shouldn't even be the focus of damage, to waste all that time running back. Experts are kind of the "end-game" for casual players since a lot won't touch trials or savage. If you don't have a first time bonus, you should know how to do the dungeon and not cause a waste of time and effort for others.
