>>281581764
Nothing. Demon Slayer is as wide as an ocean and deep as a puddle. The story is nothing out of the ordinary, it's just another generic demon hunting story among many that came before and after it. Even a child child could come up with a premise as simple as that, because it's literally "Kill the Demon King" and that's what the characters do. It's a series with an empty world, paper-thin characters, no plot twists, zero intrigue. It has nothing that makes it stand out compared to other works like Naruto, One Piece, DB, Bleach, HxH, JoJo, JJK, CSM and even MHA.
The only reason why people put it next to those works is because of how much it sold and not its artistic merits, all in large part thanks to Ufotable. There's a reason why this manga underperformed for 3 full years until Ufotable bailed it out. Which should also tell you how artistically empty Demon Slayer is, because sales is the only thing this series has going and not what it brings to the table of shounen canon.
So when people say, "I like Demon Slayer", they don't mean they like Demon Slayer by Koyoharu Gotouge who really had not much to do with its success. They mean they like Demon Slayer by Ufotable, who turned an otherwise unremarkable manga into a completely different product.