If you're willing to accept that it's vibecoded as shit but very functional, look up Fritchii, and make sure you use a 23.8GB file (the 23.3 one going around is slightly corrupted and missing textures)

Not even exaggerating when I say I've been hitting a stable 60 FPS at 1440p (ryzen 9 9900 and a 4080 super on cachyos) no issues at all 1/3 of the way through the game