First, the story is average at best with demons killing humans yet our idiot MC doesn't believe it's true. Also every great story needs a great villain and this has none of that, all cliche big bad demons just because. So many generic moments too when MC does something in the story you expect him to do, so predictable and poorly written you can tell what's gonna happen where's the fun in that.
The characters are dull and boring as hell to watch it's like watching paint dry with the way Tanjiro our MC interacts with others always like a teacher's pet. The MC trains, gets strong and uses technique never seen before and wins against demons he really shouldn't alone. So believable right.
Enjoyment - Not even one episode that's completely enjoyable especially the first 5 episodes, every episode I'm checking the watch hoping for it to end. Generic anime doesn't mean it's bad but this anime is. For example: Hero Academia is actually enjoyable and fun to watch since you're invested in the characters, Demon slayer fails at that spectacularly with stupid jokes and characters that don't matter.
Animation - Great, without it nobody would hold it to such a high level but it's a pity that other great anime with good stories suffer from animation budget yet this
gets great animation.
Overall -
Animation is great for action scenes being incredibly beautiful but it's all style and no substance as there are other great shounen anime that has both.
Edit- actually just watched it during my holiday in TV and well, it's not bad even though the tropes and cliches are there it's fine. Maybe I was too harsh before lol definitely had low expectation, but it's fine and enjoyable so far
