Horseticuffs
Full werewolf off the buckle
What's amazing is that it's probably the easiest traditional Castlevania game.
It's also a lot easier on a low-latency display and most importantly if you just stay chill. If you get upset at all you might as well just stop playing.
Oh, I dunno. Different games are hard for different people. I recently beat Bloodlines without being particularly struck by its difficulty. I played a lot of 1 and 3 as a kid and beat those, of course, that was a looooong time ago. Ol' gray mare, she ain't what she used to be.
I'm going through Castlevania: The Adventure Rebirth as well, and that's got a very gentle difficulty so far, but from what I gather that's pretty much that game's shtick.