CPU Bottleneck. How it works?

[Madi92]

So, im just curious. I have a i5 13600 and when in game using MSI Afterburner, i can see in the first Hub area that my GPU is only around 70-80% used, which is an implication of a bottleneck, but then looking at my CPU, the overall usage is around 50% and looking at individual cores, none of them goes higher then 75% usage.

I also have 32gb or ram and 12gb of vram, which none of those ingame are close to these limits.

Could someone explain, how is its a CPU bottleneck, when the overall usage is not indicating this?