As R Red said, try turning down all details, textures, shaders, resolution, etc. Also try to turn off AA (Anti Aliasing) and turn on some sort of multicore mode where the game can use all of your CPU, and RAM into that application. If it still runs slow try to look online for a Stranded Deep mod that breaks down textures even more so your FPS will be higher and CPU won't be used as much. The game might not, and most likely will not, look good at all, but at least you will be playing.I Just Bought Stranded Deep And it runs super slow on my laptop .
I think it might be bcause my laptop like 4 years old