Threadripper is honestly better than the i9s. People who invest in i9s or Threadrippers are not those who are looking to game primarily (even though you could) and worried about single core, these chips are undoubtedly indented for highend workstation use.
PC World had a good write up about it: https://www.pcworld.com/article/3198476/computers/amd-threadripper-vs-intel-core-i9-the-best-cpu-for-enthusiasts.html
Wait... Your listed motherboard is different than the pictured. The pictured is the Gigabyte GA-F2A88XM-D3H. I have the same board.