Have you only tried it raw? There are ways to cook it without losing too much nutrients. Cooked kale still has noticeable health benefits according to some studies I found.
The only way I enjoy kale is having it as garnish that gets tossed away.
my better half loves steamed kale. no amount of salts and seasonings has changed my mind. cheese and salt/pepper took me from a broccoli hater into a broccoli lover lol.
but I digress.
Chop it small (the stems really small) add sliced garlic, sliced hot pepper, some olive oil and a cup of water then cook it for 3-4 minutes only. Drink the water and (if you must) serve with lots of cheese and bacon. (add the cheese immediately or it wont melt)
Like with broth, the first day it tastes good. If you prepare it again within the next 2 days the body screams for more. Specially the water is funny, it feels as if some magic potion.