I can agree, but it only becomes worthy of note when you limit the discussion to a specific subseries that wasn't meant to be particularly creepy. Since Souls fans have no reason to pretend Demon's Souls and Bloodborne don't exist, it's hard to see it as a standout feature. My reaction is more of a "sure..." than a "yeah, that was great!"
Some of it was mechanically interesting, though, like the monsters that are afraid of fire and drop pyromancer clothing, or the fog area that precedes the N64 Woods with the camera zooming in and invisible enemies. That was pretty great. Atmosphere-wise, I don't think it did enough with it. That one part of Dark Souls III with the jailers ended up being far creepier atmosphere-wise than anything in Dark Souls II just because of this one encounter:
When it comes to enemy design, Dark Souls III was creepier in general, with also things like those big ass spiders who drop Aldrich rings, the way they move is just unsettling. There are also the cages with a bunch of dudes and the sewer centipedes. And it made more of an impact on me because you're directly interacting with them, and their creepy animations also mean an immediate danger to you. Atmosphere wise it wasn't quite there, in my opinion, but I didn't feel like it was trying too hard either.
The Dark Souls series just isn't one that I'd personally use "creepy" to describe, and I don't think of that as an issue. Demon's Souls and Bloodborne both fit into Cosmic Horror, so they naturally gravitate a lot more towards that.
