No, Destruction totally blows in Skyrim. For pc users at least, there are mods to correct that. Console users will have to hope that Bethesda fixes this issue. Personally, I would rather they fix it rather than leaving it for the modders to have to do.
Okay, good. It's not just me then. Even with 400 magicka and a current 92 in destruction with 2/2 for augmented flames, I haven't ran across anything in a dungeon I can take down with even 3 blasts (except skeltons). And then I can't cast the spell anymore because the magicka's drained. It requires one to carry an inordinate amount of restore magicka potions, which at that level shouldn't be the case.
I also have the dual casting and stagger perks. The Briarheart who repeatedly decapitated me the other night didn't seem to notice.