How to correctly arrange the menu of the site?

Question

User interface

Good afternoon!
Such situation. We did a design for the site, and initially the designer did not provide for a central menu under the header - usually they put it there. As a result - not a full menu - sections of the headings were placed in the right block and a link to the Articles was attached there.
Now, after some time, I wanted to make a central menu under the header, where all the main links would be.
Please advise how to act correctly without changing the whole concept of the site. I am attaching screenshots.
One designer made such a green menu, and also suggested putting a submenu there - but I don’t like the submenu.
and with the central menu

Answer 1

The designer suggested it to you. Beautiful green menu
Do you want us to solve your problem for you?

Answer 2

The whole problem is that the menu is somehow immediately displayed. Although the designer did a good job as well, but I stick to the fact that the menu is hidden under the icon, and this is also fashionable now and the cap will not be so high.
Here is my option