I know, but I mean slow as in unexciting. Hitman can be slow, but its exciting. This, whenever I have done so, isn't.
I never played hitman - so I can't tell you. But I CAN tell you that a game design centered around spy/sneak things with weapons and environments designed for direct stealth-assasin quests probably has those focused and refined more. You're not going to get quests in ES where you wait in the stall for people go to the bathroom, thus surprising them where you can strangle them with piano wire.

I'm sure there's many God of War fans who say the combat in Elder Scrolls is lame too...
The only thing I can say is, well, different strokes for different folks. That's kinda the whole point of Elder Scrolls... be who you enjoy being.
So, if stealth in the game isn't for you, then it's not for you.