Why do Lost Ark textures look blurry in 4K with DLSS Quality mode?

I was desperate when I noticed the stunning 4K scenes in Lost Ark had a blurry smearing effect, making textures look like oil paintings. I first tried switching DLSS to Ultra Performance mode, but the image became so pixelated it was like looking through nearsighted eyes. I then used the GamePP DLSS/FSR Image Sampling Calibrator to raise sharpening intensity from 50 to 82 and locked the render scale to 100%. RivaTuner showed a significant increase in pixel fill rate, and GPU-Z confirmed temperatures stable at 62-68℃ with a steady 1500 RPM fan speed, allowing me to switch