I have been a few years in the game and I know what can I expect when I do dungeons what kind of people you can find, the type of everything is a rush and finish as fast as possible, but come on I might expect that in max level content.
If you are a new player and you want to be a tank you better off not playing this game. Because by the time you reach level 80 you wont know to play your character thanks to Blizzard allowing level 80s characters to enter a normal dungeons, by the time you press two buttons everything is dead.
Fix the game.