The UE engine itself is very demanding on PC resources, so it's not surprising that you have low FPS, as it is advisable to run 3D games on a dedicated graphics card.
Try to run the game with DirectX 11:
1. Create shortcut of the ParasiteInside.exe.
2. Right-click the shortcut, select Properties, and in the Target field, add -dx11 at the end of the path.
3. Apply the changes and try launching the game using this shortcut.
Later, I will add the option to scale the resolution of the screen, which may help to run the game on very low-end PCs.