Mega menu (2)

Good evening,

I am still experiencing a series of problems with the mega menu, even though I have removed many of the items in it.
The display of the submenu is not the best if I use the MEGA MENU option. Option that I don’t want to remove. Unfortunately I can’t even edit the php file as the entry is not present in my wp dashboard.
I will explain in detail the problems I encounter, mainly concerning the division into columns and the fact that the space between the columns of the submenu are not equal to each other.
Specifically, in the PSORIASI item I had to use the “this column starts a new row” option to overcome the problem, but I don’t like this on a visual level *see photo 1.

Another problem is found in the NEWS item, in the submenu yes you may notice how the GIORNATA MONDIALE DELLA PSORIASI item goes too far towards the last item of the submenu *see photo 2.

Finally, a problem that I have had since I started working on this website, the CERCA IL CENTRO item, inside it there are the entries of all the regions of Italy, in this case not only is the space between the various columns not the same, but the last two entries of the submenu are positioned too far apart from each other, under the first and fourth columns *see photo 3.

Furthermore, I would like the menu item SEARCH FOR THE CENTER to be highlighted. If it were possible to change the background color only for that portion of the menu with CSS or, if it were possible to change the color of the text, but I repeat ONLY FOR THAT MENU ITEM https://prnt.sc/QdkYeyVHaM35

I hope you can help me solve these problems.
I also attach a series of extra photos.
1. https://prnt.sc/Wa2Oo3u3px1N
2. https://prnt.sc/Jwc3BIsA1J6M
3. https://prnt.sc/0cjYJVwKBmQT
https://prnt.sc/KhK3jaU6s-Oi / https://prnt.sc/5NROCK4CqRP0 / https://prnt.sc/be0td4-9rmXe / https://prnt.sc/DUD97y6fMduK / https://prnt.sc/JrVc7U75v0rA

Kind regards,
Mariarita