User blog comment:Sgt. S.S./Are dragons possibly too much of a challenge?/@comment-4773096-20120227010507

Your first problem was when you used an iron greatsword. Iron is by far the worst weaponry to use. Dragons aren't too hard (although I, too, have been massacred by an Elder Dragon). It's Draugr Deathlords. It may have just been a glitch; I had a problem where it seemed that Alduin was invincible, but the next time I fought him I won. So your game might've glitched out.