I have the same problem. This game just drain everything from my PC.
My PC is not high end, I just have i39700, 16gb ram, and 4gb video RX570, even with WTFast, the FPS are a JOKE. I am between the minimum and recomended settings.
the truth is that I never thought that I would squeeze so much resources.GROSS.
Is unplayable to me, and is frustrating because is I paid for 3 months...
I hope the proyect work better in the future u.u