Does changing process priority fix the instant frame drops in PUBG cities with an RTX 5080 Ultra W?

Using a top-tier card for a game this poorly optimized is a total joke. When dropping into Pochinki, my FPS would dive from 200 down to 90. The GamePP sensor page showed one CPU core pinned at 99% while the GPU was just chilling at 40-60%. I tried cranking every setting to Ultra, but that only made the GPU 5 degrees hotter without fixing the drops; it was a complete waste of time. Finally, I went into the GamePP Resource Scheduler Panel and forced the game's main process to Realtime priority and killed every useless background update. In RTSS, the frame time fluctuation of 5-25ms tightened to 5-12ms, and that choppy feeling finally died.