Why does Call of Duty 2026 feel laggy despite low ping?

The game felt like 200ms lag despite 20ms ping, which was infuriating. I tried overclocking to 5.5GHz, causing a system blue screen and restart. I used GamePP Fan Curve Panel to increase water pump speed from 60% to 100%. Cinebench R23 showed a stable 25000 points, and HWiNFO confirmed temperatures stabilizing at 85-88℃ instead of 95-98℃.