Hi i have a decently powerful rig but at the lowest settings and on performance mode it still run very poorly and the frames drop rapidly.
Specs?
try playing with worker threads in the launcher put them somewhere 60-80% of the total threads you have , otherwise if you have a very new GPU but an older CPU try putting graphic settings to high so GPU workload increases and CPU decreases playing arround with the decal settings at the bottom would also be a good because it lowers CPU load, disable DLSS and Raytracing try using Super Resolution 2.0 on balanced and cap your framerate.