Must be a bottleneck somewhere. I get high usage no problem. Game is very CPU heavy.
Took some screenshots for you at one of the more intensive locations with the OSD on, 1440p with an overclocked RTX3080.
Film grain, motion blur and chromatic aberration always off.
Max settings (some even to Psycho) with Psycho RT and with no DLSS (native) :
Max settings with Psycho RT and with DLSS Quality :
Max settings with No RT and with DLSS Quality :
Max settings with No RT and with no DLSS (native) :
Tuned settings (everything max except cascade shadow resolution on medium, volumetric clouds on medium, volumetric fog on medium, Space Screen Reflections on Ultra) with No RT and no DLSS (native, and how I've chosen to enjoy the game) :