Why is Overwatch 2 stuttering on YMTC TiPro9000 4TB SSD?

In fast-paced payload fights, whenever ultimate abilities trigger, the screen suffers from sudden, inexplicable micro-stutters that make aiming impossible. I first tried lowering texture quality to Low, but the graphics became blurry and the stutters persisted, which made me very anxious. I accessed the GamePP Resource Scheduler and set the game's disk access priority to Realtime while disabling background services. Frame generation time converged to 13.2-15.8ms per RTSS, SSD temperatures hit 48-55℃ per AIDA64, and I/O wait time dropped to 12-28ms per LatencyMon.