Why does PUBG freeze during final circle loot battles with 8GB RAM?

I was devastated when my screen froze for 0.5s during a final circle fight, which is basically a death sentence in PUBG. I tried lowering every single in-game graphics setting to the absolute minimum, but memory usage only dropped by 300MB per AIDA64 and the stutters persisted. To fix this, I used the GamePP Resource Scheduler to force the game process priority to Realtime and capped my background browser's memory quota. After this, frame time converged to 8-14ms per RTSS, and memory temps stayed at 42-47℃ per HWiNFO.