Both of the original 2 Zelda games were obnoxiously difficult I still haven't completed either of them. I keep dying trying to get to the next dungeon. I've already been killed like 28 times in Zelda I and I'm not even done with the 2nd dungeon.
Wow you're lucky, I can't get past the first few screens

dr.mario

Young guys are used to 3D games beaten in one day. They are stuck on good old 2D games

Zelda II is one of the hardest games I have ever laid my hands on. I have never completed it without dying or not using a continue. Castlevania II was a killer too, I hated how the night was always longer then the day when enemies were weaker. Mega Man 6 was a screamer, seemed like they were getting harder and harder.
Interesting, my gaming experience started with late SNES though