Well,don't worry,there will be ever a reason to complain about on these forums

the most funny thing is when someone use cheats or max up all the "powerful perks" and then open a thread here because "he/she find the game "too easy".

You want a challenge ? play as a pure mage without armors and using only alteration and illusion.
The game have endless possibilities in this regard,you've to find out "how to play it " according to the developers choice.
Of course someone will complain even about the lack of "challenge" when you're at level 81; and here i agree partially.. as i've specified in other similar threads we need more enemies/variety with a scaling system applied only at high levels -waiting for the dlcs of course in that regard that would add more "levels" probably.