That's fair. I find drafting difficult too and only win a game here or there if I play someone inexperienced or I get an incredibly lucky pull. But I feel like I learn quite a bit by drafting, even if I don't know the set.
Maybe a better way to learn deck building is to check out the meta game and figure out how each deck works based on its contents? Though that only takes you so far, you do have to play the deck and interact with others to really learn it.
Yeah it is difficult, maybe not the best way to learn. But making mistakes and seeing how others play their decks can be valuable experience imo.