Update your graphics drivers! This absolutely should be a documented issue. The game slowly “leaks” VRAM and RAM to the point where the game crashes due to not enough RAM or stutters due to not enough VRAM.
As for FPS, this game is actually really smooth. Locked 60FPS smooth and only around 50% GPU usage on max settings on my RTX 4060. But this RAM+VRAM leak issue absolutely needs to be fixed ASAP, since I regularly need to restart the game every 20-30 minutes due to this issue.
Also, my first instinct for all these issues are to clean install the newest NVIDIA driver versions. Didn’t fix anything.
Edit: The game hard crashes when swap usage reaches 60GB. I don’t even know how a game is able to use that much RAM. I have 16GB of dual channel physical DDR4 RAM @ 2933mhz.