(Cloudflare says I'm blocked from accessing the webpage, even though I'm using a residential IP)

Could you share this script?

Also how is your experience with actually using the VM? Can you get most/all of the GPU resource? Is it fully passing the GPU through?

Running Linux bare metal on that PC would be much better and make the whole process at lot more transparent. Most games that don't rely on some kind of kernel anticheat (effectively, a rootkit) just works.