I have to take back my recommendation for Khazan. This is a game for hard core Souls and Sekiro players who don't cheese or grind levels. None of that is going to help you here. To say it is brutal is an understatement and it continues on a trajectory of raising difficulty on a steep slope. If you play Souls and go straight through to bosses only doing one sweep of the area, I'd let the recommendation stand cause it is good for the mind set of over coming challenge inch by inch but for everyone else nope. Stay clear.
I'm not far in, maybe 6 or 7 hours, it had already surpassed Elden Ring, Blooodborne and Sekiro in difficulty and it keeps ramping in big chunks, it's not reached Nioh 2 levels of punishment yet but at this trajectory it won't be long. This game might filter me and definitely would if they hadn't ripped of Sekiros buttons cause there's no way I'm getting through this without strong muscle memory. Idk what I was expecting but I wasn't expecting it to be this hard-core, regardless it keeps it's fun and I'd even say more so than Nioh 2 which was on a knife edge between difficulty and fun, learning mechanics and telegraphs in this is easier so in a way you have a better chance. Once I get to a boss that takes me more than eight hours I'm dropping the game regardless of how fun it is cause that's the time I expect from an end game boss, not sonething at less than 20% of the playthrough, I imagine that'll come soon cause every boss goes up like 50% in difficulty, not to mention the areas are like Lies of P's last few hours right out the gate. They really went for the hard-core Souls people with this and I kinda resent them for not making the demo representative of what you'll face soon after but I can't complain because aside from the camera clipping it is the most fair of these games next to sekiro, every mistake is entirely on you.