rmesceo
You need to change the correct class 🙂
For example, if you want to change the class for extra large screen, you need to change the class col-xxl-2 to col-xxl-4
The total grid of a row is equal to 12 so when you change from 2 to 4, you need to adjust the class for the header-nav from col-xxl-10 to col-xxl-8
The same for col-xl- classes
I just updated for you so you can see.