The plot in Souls games is minimalist. The backstory is there, but also kind of minimalist and not in-your-face. Whether or not you like it is up to you, but it's obvious that the lore, backstory, etc. are not as shallow as you might think.
Saying they have a "shit story" seems absurdly harsh. Not all stories have deep, complicated plots. It certainly doesn't have much in terms of plot twist or climaxes or anything like that, and if that's what you want in a story then you might be left a bit cold, but that doesn't make it bad per se. If you really think it is bad, well, I can't change your mind, but hey, at least it's not intrusive.
Personally I am indifferent to it. The lore has some moments of greatness, though I'm not as heavily invested into it as others who spend hours dissecting it are. I just don't care enough, and it satisfies me, because I can focus on the gameplay experience. I actually really like the minimalist approach and I wish more games would do the same. I love cinematic, cut-scene heavy, more straightfoward storytelling if the story is good, but since it so rarely is, I tend to prefer the Souls approach.
tl;dr if you're gonna spam cut scenes at me, they're better be damn good. Uncharted 1 & 2, TLoU, Legacy of Kain, Panzer Dragoon do this, and it works because the stories are great. They seem to be rare exceptions though. For the rest, give me minimalist storytelling like Souls, please!