the cpu is bottlenecking the gpu severely. computer noob here, but i heard it might have something to do with resolution? i have a 1366x768 monitor, since i'm cheap.
i have subnautica aswell, and average's at around 20 frames. NOTE: no frame differences in high/ultra settings on either game. also i had that monitor before this pc, for my laptop.
which is why its not 1080p, because it was 75$.