Just tried on my Steam installation and it looked to patch OK. It crashed with a DX11 error when I first tried to run it though Tried again and it sat for ages loading to Agartha and had to end task it in Task Manager Serves me right for reinstalling GeForce “Experience”
Third time lucky, it appears to be running OK, so it’s definitely not a universal steam issue.
If you have redownloaded, it might be worth trying to run PatcherSetup.exe directly as admin, to see if that makes a difference:
That has worked for me in the past. Most often though when I have had this same problem, it has been an underlying problem with my ISP that I couldn’t see. Hard resetting my cable modem (power off and physically disconnecting to force a reset of my IP) has resolved those (rare) issues.
Good luck, I hope you find a way through…