Couple Questions. Did you tell them it was your first run of ZG?
Did you check out the dungeon journal so you had a half a clue as to what the fights would be?
Did you put effort into your gear? From your armory it looks like you haven't, your 378 gear at the least should be gemmed/enchanted, and throw a cheap carnelian in the other gem slots you have open.
Don't be afraid to apoligize if you do mess up in a group. That goes a long way from silence after you make an error, which can give the impression you don't care.
And no Namrick, he's not hit capped, but what he has works fine in heroics, just to low for a raid. Really have to replace your belt strength rings, Int chest, strength gun, and your strength trinket, strength is near useless for a hunter, agility is your go to main stat. If your dps was low and I inspected you and saw those I'd probably kick you too, after I asked why you had it. If you replied cause you couldn't get anything better when there's better alternatives through quests and the AH I'd still kick you.
Fix your gear up some, check out the fights more, and be polite to the group (idk if you have been, just going by how most people are in LFG) and I bet you'll get kicked a lot less. You'll still find the occasional "ZOMG YOUR DPS ISN'T 50k GTFO" but your runs should be much smoother.
If you are a troll, congrats I bit, but here's hoping someone actually in this situation reads this and takes the advice.
Edited by Temparia on 5/31/2012 4:45 PM PDT