The real question is whether you should upgrade your GPU now or in 6 months.
Your graphics settings are indeed pretty moderate. How many monitors are you driving with that 6800 XT?
Every time I see a screenshot with those repetitive red spikes I think, “There’s something very wrong with the way data is being handled on that computer.”
What happens if - just as an experiment - you try 2K instead of 4K?
I overlooked those repetitive red spikes! I had that once and running the system file checker tool (SFC) cleaned up some corrupt system files & fixed the issue.