lol i dont know what you have been reading but performance really isnt as bad as you think it is, unless you want to play at 4K or something.
On my 3700x, 32gb ram, RTX 3070 combo the game runs at 50-60fps at 1080p Ultra, except shadows on High, and DLSS on Quality.
In fact if i change my desktop to 50hz, the game is pretty much locked at 50fps, and i'm about 4 hours in.
By the way its the shadow setting that is the big performance hog with this, NOT the global illumination setting which controls all the RT stuff. I'm not certain why the shadow setting is so demanding but put that on High and everything else on Ultra and you will be more than fine.