Do you have the Auto Overclocking On or Off? The reason I say this is the fact that you may have to set the CPU overclocking manually instead of letting the motherboard do it for you.
You dont know what type of Overclocking this other guy have/is running. He.may be running 1 or 2 cores overclocked while the others are not. Or even playing with the CPU voltage (undervolting) etc. In addition, the type of timings the memory of his build is running.
There is a good amount of factors that can play to achieve that goal/score and you dont know this guys setting in the motherboard.

Last question. Windows 11 22H2
 
So my fps is the same on 720P and 1080P. Switching between resolutions my fps is the same,no performance change. Only gpu usage is changing. The same with DLSS. Switching between DLSS Quality and Performance not affect performance on 720P and 1080P. Only gpu usage is changing. I am somewhere bottlenecked or games issue? I test 3dmark firestrike and here is normal. On 720P 350fps. On 1080P 250fps. So scaling between cpu and gpu is broken in my pc,in Watch Dogs Legion.
But why i am bottlenecked?
Bios is updated
 
I found test and on 12900K should be difference in this game between 720P and 1080P.
 
Screens: 

 
 
 

90-115 fps

I nothing changed literally. The same all settings etc.I resolved almost. I must play minimum 15 minutes ( driving around the city ) to get usage back to normal. So in first 15 minutes i have 60% usage,then after 10-15 minutes it sky rocket to 80% and stay. Why? Memory leak or what drivers? or slow ram?or game issue?
 
Ah i am actually on 4090 rtx btw

Why i have usage 60% on 1440P RT ULTRA,DLSS QUALITY? I have 12900K + DDR4

I compared with someone and he have 80% usage. He have 13600K + DDR4
 
Link:
https://www.youtube.com/watch?v=pNWolLQdMJI

I doubt its because cpu oc