I mean, the game definitely runs like shit but if you keep crashing that sounds like a you problem. My 7600x/6700XT/32GB DDR5 build hasn’t crashed once in 15 hours of playtime and I’ve heard a ton of complaints about the game but barely any about crashing.
Yeah anything with a GTX prefix like your 1660S doesn’t support DLSS, only the RTX 2000 and up works. I agree completely, I’ve never used upscaling before as I’d much rather have a clearer picture at native resolution, but if I wanna stay above 30FPS minimums then I need to use FSR with my RX 6700XT running at 1440p. Didn’t think I’d play any games that made my GPU feel that bad for at least another year or two.
Most people think DLSS is a better upscaler than FSR so that’s why people wanted DLSS support, but it only works on Nvidia RTX GPUs, while FSR will work on both Nvidia and AMD GPUs. Downside is FSR apparently isn’t as good as DLSS but I can’t confirm that as I have an AMD GPU.