I might be crazy, but I felt like Demons' Souls contained far more "how was I supposed to know that???" with regard to crafting/upgrading weapons than Dark Souls. I'm a terrible person who hates "my numbers vs your numbers" battle systems, so I used weapon and character build guides for both games because I really loved the atmosphere and wanted the experience-tourism.
Playing Dark Souls, I felt like I could have blundered through the game without following an optimal character build guide so religiously. I say that, although I had more trouble with bosses in Dark than in Demons.
Really, I know neither game is meant for me: I want more reliance on player skill and less on stats. That's why I think Bloodborne will hit the sweet spot for me.