Really? What difficulty are you on?
I find the game easy up to ~level 35, then I start to come across draugr deathlords and ancient dragons, which hit like a tank on master.
The one below the hardest difficulty, don't remember how it's named. I have never played as a warrior, my characters are either thieves or mages. When I play as a thief, the game becomes ridiculously easy as soon as I get the 15x backstabbing bonus and wear DB armor. That's 30x normal damage and if that's not overpowered, I don't know what is.
My mage characters become overpowered as soon as they get the dual-casting stun perk.
I've never been over level 30, so I don't know, maybe the game becomes much more difficult after that.