Thanks again Druid I appreciate it.
I'm going to try a few more of these options but I'm focused on handling the stuff I thought I previously addressed that Requiematic pointed out. I tried to be thorough in my documentation of the problem but we can't expect help that way. I can't stress enough that I have no overlay apps or other cruft installed. edit: note I did post my dxdiag
At this point I have wiped my HDD and flattened a windows 10 install partition and reinstalled ONLY the nvidia driver and important system drivers and the intel LAN driver for network access. I'm actually posting from my phone because I didn't even install firefox to access steam forums. From a system with nothing but steam and Valheim installed with the most recent nvidia driver it took 11 MINUTES to load Valheim with no gamesave. The beginning dialog was crawling up the screen and took about 3 minutes to complete before the crow model finally dropped my clean character at the spawn location. Then I was immediately killed because nearby lizards were attacking long before my screen even showed them at approx 4 FPS. The game is unplayable.

On the same windows install for comparison, since it's a game I'm used to the way it performs to avoid ambiguity. I just went ahead and installed Cyberpunk 2077, at a minimum I am seeing 90FPS in a dense city area and load times under 7 seconds between areas. CP2077 isn't as fun as I hoped but it loads and plays.