Skill issue. Try Modern.

I have already compiled Shaders.
I have had the most scattered experience with this game. Sometimes it runs fine at 4K, sometimes it likes 1440P, 1080P has never worked for me, sometimes 720P I can max things, and other times 720P is so harsh it's like don't even try. On all resolutions however, it will randomly slowdown, to 10fps.
This screenshot was taken with a fresh install of Windows 11.

You might have a problem with either your windows, drivers, or PC in general. I have a Gen 1 Ryzen 1700X 16Gb RAM GTX 1080 Founders Edition non TI and the game shines 1080P all settings ultra.
My son has a Gen 1 Ryzen 1600X 8Gb RAM and a GTX1060 same settings in 1080P with anti aliasing & vsync off and it also shines,

We both run Windows 11 latest drivers.

The game has an option to compile all your shaders before playing but by default it's not set to on. Go to your settings and in the "game" tab there should be an "other settings" or something similar. There will be a shader related option there, turn it on and restart. It'll take a while depending on your hardware but after compiling you should be good to go.

That could be it

wtf!!!!!