Out of curiousity, what kind of equipment did you use? While the gameplay will always feel a bit clunky unfortunately, your character's equip load makes a big difference in how well it controls.
I went with medium equipment all the way. Sometimes I picked up light armor, though.
Perhaps you should try Bloodborne. Combat (and by extension movement) is faster and more agressive... and while there are definetly some narrow corridor areas, I would say they are generaly more open than in Dark Souls. Story is similarly vague, but I think it's easier to have a general grasp of what's going and what are you doing (although you definetly need to talk to NPCs, read items descriptions and such to get a better idea). And even if you don't really know what's going on... like on NPC will tell you, you shouldn't worry too much about it. At least at first. Oh, and while there are some RPG elements involved in your physical condition and your weapons (and they are worth understanding and playing with in order to get better at the game and have more options), they are not nearly as important as in Dark Souls.
Of course, Bloodborne is still a difficult game, there are some unfair situations and you will still die a lot. But I believe most of your complains with Dark Souls will either disappear or be somewhat reduced in Bloodborne.
I would never play Bloodborne, Dark Souls feels pretty unnerving with its gritty and apocalyptic world, but I managed to tolerate it. The PS4 exclusive not even looks like that, it also looks downright spooky, and gotta give it credit there because it sometimes does it with cliché horror elements, like giant spiders, werewolves and the like. I can't deal with that. It's precisely the other From game that looks so good, though, I especially like how interestingly includes features of the Lovecraftian mythos.
I'm gonna confess something: everytime I played Bloodborne at night, I had trouble sleeping that night. While playing, I wasn't too scared save for some specific moments. But my heartbeat was over the clouds at all times. It was a combination of the game's atmosphere and the fact that everything and everyone could kill you if you were not careful. And of course, when I tried to sleep after playing... I struggled. My brain was too excited to sleep.
Never a game made me so tense in my life. And yet... I fucking loved it. I came back for more day after day. Despite the tension. Despite the bad sleep. And it was worth it. Imagine how good it was to me xD
Anyway, my point was that I understand what you say. I've been there. And if you really think you're gonna have a bad time by all means: don't play it. But from my experience, this game is worth getting your pulse rate to 100. It's just that good xD