My setup is following:
ASUS ROG STRIX X570-F GAMING - AMD X570
AMD Ryzen 7 5800X
Gigabyte RX 6800 XT
HyperX Predator 32GB DDR4 3200 CL16
game is installed on SSD Seagate BarraCuda, 2,5" - 2TB
playing at 1440p
My graphic settings is further down in screenshots if it matters.
My question is - is there something wrong with my PC or does Odyssey still need a serious work on optimization? I mean any other game runs great so I still suspect Odyssey being at fault here.
Odyssey still needs serious optimization. How much more we'll get, I do not know.
Anyway, your system is likely memory performance bottlenecked in CZs. Better binned memory would help modestly. Sufficiently fast RAM (meaning extensive manual tuning--they do not sell memory with built-in profiles that would qualify, as they could not ensure compatibility) helps a lot on a 5800X. A 5800X3D, almost irrespective of system memory performance, helps more.
How is your performance
Some of my performance testing at large settlement CZs (first video is medium intensity, second is high) using very similar settings to yours:
Second video is also using DXVK because 22.5.2 is where out-of-box AMD driver compatability with Odyssey ended and I was testing workarounds. It had very little performance impact.
A slightly older, but still very relevant, direct comparison between my system with a 5800X then a 5800X3D, in the suit tutorial, for repeatability, and at 1080p (still ultra) to reduce the GPU bottleneck: