You are probably slightly bottle necked.
Do you know how to do an msi afterburner overlay? to show gpu and cpu usage?
I would bet your 3080 is at like 60-70%. What ram do you have? Do you know if you enabled the xmp profile for it?
Your setup is still good though. When I had my 3700 I was getting around 120 too. My gpu was only being pushed to about 60-70 percent because the cpu was bottlenecking it though.
Getting the 5900 was the single biggest change to getting around 200. All those optimization steps are a couple frames here and there, but can add up. Each one is not that significant. However with a bottleneck there's not much you can do to get past that without upgrading.
Should my GPU be getting 70%?