I'm not. The bow is to me (on master) only really useful if you can get the 3x damage bonus. When things get tight (and they do sometimes, no matter how much I try to avoid it), I have to rely on sword, block, smithing (also on bow), and potions. There is simply no way of surviving relying on archery alone. Why should destruction?
You're doing it wrong. With the extra damage perks, faster drawing and moving perks in archery, even when enemies get close, knock them back and shoot an arrow into them whilst moving backwards. It isn't hard, and they go down in a few shots (this is setting aside the fact bows are supposed to be long range where as magic isn't supposed to have a range). Not hard with the perks.
Even with every single destruction perk, and exploited enchantments, destruction (and magic by and large as a whole) isn't very viable after the mid 20 levels. Seriously a bow at close range is still better than magic. That's ret-arded.