Yeah, unfortunately that's kind of how it is. I don't know how many SNES or earlier games you've played but it's a similar design philosophy for that era of games. You were expected to be a kid with massive amounts of free time - and generally back then our game libraries were only a couple games.
When I had ALttP on the SNES my only other games were Wizardry 5 and Mortal Kombat - so it was easy to remain on-task with ALttP and not get frustrated/distracted by other games.
There was no handholding or guided-ness to games. Usually a notebook by your side to keep track of locked items, hand drawn maps, and etc to keep track of everything in between sessions.
It didn't matter much as a kid back then because that's just how games were. I mean look at the mega man games - those are brutal to try and play now. But for someone going in fresh, without the nostalgia factor, I can see how it would be considered difficult to get into.
But there's no shame in not finding it enjoyable. Just because it's a classic doesn't mean it's for everyone.
If you're set on it though - and you have a 3DS - A link between worlds is a good medium. That's a bit more modern and not as difficult, while maintaining the core gameplay. I think I died a total of 3 times on my first play through so it wasn't difficult at all.
Playing through that then going back might make ALttP more enjoyable on a second attempt.