My Sapphire RX 7800 XT 16G has instant frame drops when entering Saint Denis in RDR2. Why does this keep happening?

Riding through Saint Denis, the screen would just twitch every few seconds—a subtle hiccup that completely ruins the immersion of a slow-paced game. The GamePP Frame Time Analyzer showed intervals fluctuating between 11-14ms, but during those twitches, it would spike to 42ms. I tried updating to the latest AMD drivers, but the stuttering actually got worse, which made me very wary of 'latest' updates. I then used the GamePP Peripheral Driver Conflict Detector and found an old controller driver spamming I/O requests, clashing with the GPU scheduler. I killed the redundant service and stripped all unnecessary overlays.