The remaining hardware is inconsequential for the following question.
I think it is important to know what video card you are running. Also have you tried booting CD\DVD mode as that’s what i use because the live USB doesn’t work for me.
The way I understand it, motherboards have gone through a transition from:
1 BIOS/mbr only on old boards
2 Hybrid motherboards which could do either BIOS/mbr OR UEFI/gpt to fill the gap
3 Modern motherboards that do UEFI/gpt ONLY.
Since my motherboard has the latest AMD Ryzen chip set, I am fairly sure it is UEFI/gpt only as it refused to even think about USB BIOS.
Anyway I finally got back to it and with some fudging around I was able to get Antergos Gnome lvm up and running. I had Fedora 30 Workstation Beta on my NVMe card, and I was installing Antergos on a SSD.
So in response to Joe’s suggestion of trying a LVM install, at least two of us has done it.