maybe your character is overpowered. When choosing any perks, the ones that are (0/5) I always leave at (1/5). Anything more is overpowered for me. I made a nord barbarian character who is a [censored] and doesn't like any magic or enchantments and it has been the hardest playthrough ever. svcks having a character without any restoration.
Try making the game more challenging for yourself. its not like any higher difficulty will make enemies smarter

ok maybe making a few notches on the difficulty might just mean 2 hit kills....Hears a few ideas
more intelligent designed ambushes , not just a couple peeps pretending to be imperials....For instance more invisibility used by foes...ex-bad grey beards able to use dragon shout, ie 3 of em using whirlwind sprint so you can outrun then or they use slow time on your character.....Characters who use doppelgangers of themselfs that are just there to distract you, Super fast moving Ninja, I did play a game cant remember what but you had to fight a character of yourself that had the same stat