Why are loading screens so slow in Total War: Warhammer III?

I was excited for the battlefields, but 10-second pauses at every loading screen were a total mood killer. I first tried enabling write caching in the driver, but while writes improved, read speeds stayed flat per CrystalDiskMark. I used GamePP NVMe Queue Depth Configuration to increase depth from 64 to 256 and optimized the scheduling algorithm. CrystalDiskMark showed an 18% increase in 4K random reads, and AIDA64 measured temps at 38-44℃.