The core problem is the show being way too dark. Dark fantasy and dark themes in stories aren't inherently bad. The problem here is that it gets tiring. There isn't a single ray of hope aside from the relief of the MC figuring out how to avoid unimaginable tragedy #27. In fact, they tack on a bit of lore that makes every horrible thing even worse around the 2nd season. I liked the show when I first started because I assumed it would progressively lighten up as the MC grew, but it doesn't.
As time goes on the plot deteriorates further until all that's left is beautifully drawn torture porn. I'm sure some weirdo wants that, but it doesn't make a good story. Also, the time loops eventually just make the plot feel like it's badly paced.
This show feels like a vestige of the early days of isekai, when people were still probing to see what would sell. This one got a following because it's pretty and there weren't many options yet, but the 8/10 rating is frankly outdated.
