Kicked and ninjed at the end of the dungeon in hardcore

Hello. I got kicked from the group in WC at the end of the boss fight in hardcore anniversary and they ninjed the chest piece (a druid) from the murloc boss because they said I tanked badly. It was my first time tanking, they were in a group of four. When the dungeon ended, one of them told me I tanked badly and shouldt do it again, they kicked me from the group and everyone used need on the chest, even the druid that can’t even use it. I asked the druid if he can give it to me and he used /ignore while the other laughed at me. All this to make me feel bad. THis makes you not want to play anymore. You do the best you can and you receive this. Nobody died in the dungeon, there werent even any problems. Obviously I will never tank again and I might not even pay my suscription next month after this. I thought people followed the rules of conduct, I am always kind and helpful to others. This really depressed me.

The group was:
Airrwoh-Doomhowl (the druid that ninjed the item)
Kwatokiyami-Doomhowl (the one who told me I played badly, and then also go to the tabern where I was and laught at me)
Nespressoo-Doomhowl
Waterportal-Doomhowl

Wrong forum region man.