The last boss in Hellfire ramparts, the dragon, is way to hard for ordinary players! I tanked him with a warrior with 6k HP and he killed me in 1 second (not joking) 4 times in a row! I really want blizzard to nerf the dragon because its way to imbalanced.

I am not the one making balance changes to the game, but don't you think 4 times (I don't know if you have tried more times, just going by your post) is too soon to be calling for nerfs? Just imagine how much better it will eventually feel to take that dragon down.

I hope you give it a few more tries and end up killing him. Good luck :)