Destruction is supposed to be different, and require different ways of making it better, hence alchemy and enchanting, as a mage should use more than just one school of magic / knowledge....since they are ALL about knowledge.
Ofc it is supposed to be different - but it is also supposed to be overall as useful as the other damage skills. That means it may do more damage but have less side-effects/other advantages, or vice versa. The thing is, it has much less of EVERYTHING.
Also... why is it that people always bring up the other scools of magic in talks about destruction? WTF do they have to do with it? Yes, you can summon daedra and cast oakfless, brew potions and enchant items. Yeah. So can an archer, and they can do 5 times the damage at twice the distance...
The talk was never about it being hard to play a destruction mage - it's just about Destruction being EXTREMELY WEAK. Which ofc makes it super hard to play one early game, and late game it's:
1) get 100% cost reduction
2) Get impact
3) Stunlock enemies for a minute till they die.
When a high level archer is
1) Enchant everything with Fortify Archery
2) Get the slow time perks
3) One-shot everything in slow-motion
There is no point discussing which is easier, however it's obvious which of the 2 is just WEAK...