Here's the thing that really confounds me.
NPC mages are able to do TONS of damage with the same spells that svck for the Player Character. Something is wrong.
When magic resists were broken, I found out about the bug the hard way: Stepping on a Fire Rune. Now, fire rune according to the spell description, does 50 damage. Assuming that the caster had the fire damage perks, it would do only 75 damage. However, somehow this 75 damage Fire Rune killed me instantly, despite the fact that I have 250 HP. Something is wrong.
I dont know how much more obvious it needs to be for you folks who think it's just peachy-keen that something is definitely messed up. It seems to me that the damage is supposed to scale for the Player Character just like it seems to scale for NPCs, but it's broken.
To the people who say "it's a single player game and doesnt need to be balanced", you need to open your eyes. If the game didn't need to be balanced, they would have left the option to be a mage completely OUT of the game. It would just be a hack-n-slash platformer with no leveling system and no option to play any differently. If that's what you want, Skyrim is not for you.
TL;DR = NPC destro damage scales, Player destro damage does not. Destruction = broken.