cleaned up some clunky phrasing.
As a rule, especially when using Youtubers who don't run their own benchmarks, check sources, and if you can "meta-analyse" the results from multiple sources.
I've been burned by this is in the past personally, so I speak from experience we always look for confirmation bias.
A 9900k will perform exceptionally (as you'd bloody well hope from a £500 cpu) If you're running at 1440p or above, and it's within your budget, enjoy the 3080, otherwise look for something else (if you're not super into ray tracing, a used 2080ti or lower could be a good deal right now)