How to fix blurry visuals and detail loss in S.T.A.L.K.E.R. 2: Heart of Chornobyl with Thermalright PA140 WHITE Peerless Assassin?

During a close-up of the character's face, DLSS Quality mode blurred the fine textures, making the metal texture look like it had a soft-light filter. I tried switching DLSS to Balanced mode, which increased FPS by 8 but worsened the blurriness. I used GamePP DLSS/FSR Image Sampling Calibrator to raise DLSS sharpening to 75 and set the in-game render resolution to 100%. RivaTuner confirmed significant improvement in effective render pixels. HWiNFO showed fan speed at 1500-1700 RPM and temperature at 56-62℃, ensuring thermal stability.