Why does Overwatch 2 freeze during hero swaps with Zhitai TiPro9000?

In the heat of combat, my screen would freeze for half a second, which is a total disaster in a competitive shooter. I tried enabling write cache flushing in the system drive, but it just caused worse system latency and weird mouse drifting. I finally used the GamePP NVMe Queue Depth Configuration to bump the queue depth from 32 to 128. Now, CrystalDiskMark shows 4K reads hitting 85-92MB/s, HWiNFO confirms temps at 55-62℃, and GamePP Tool shows SLC cache occupancy is finally managed.