Display Products by Brands + Category? Exclude/Hide Brand?

Hello

I have a menu/submenu like this:

MENU ITEM 1/SUB MENU ITEM 1
Cat A
Brand X – list all product from brand X that have Cat A

MENU ITEM 2/SUB MENU ITEM 2

Cat B
Brand X – List all prodycts of brand X that have Cat B

MENU ITEM 3
Brands – List all Brands

I’ve created 3 different brands with the same logo, they differ only in the slug:
/brandx-cata; /brandx/catb; /brandx

To list products in submenu itens 1 and 2 i intend to use [products brands=”brand-slug”]

To list all brands (menu item 3) I would use the all brands shortcode but I would need to keep here only the brandx and exclude /brandx-cata and /brandx-catb brands. So the question is: how can I exclude these brands from the brands list?

Also, this isn′t be all means the best setup. I’ve done it because I found no way to list brand x products filtered by categories A and B (for menu itens 1 and 2) – that way I would be able to have only one Brandx instead of 3!

Thank you