Use Categories en Gender form category tree in filters
If you organize your categories by gender in Shopware, you have a clear gender-specific funnel with clear and structured navigation. Why aren't these also used in the filters, or why do you have the option to do so?
Applying all filters via attributes doesn't work well. Especially not on the brands page, where you don't have good SEO-friendly pages based on brand/category. If we enable categories and genders in the filters, we only see the male gender for unisex products when filtering for women, whereas you don't want to see men at all when you are in the women's funnel. And if we enable categories, we see duplicate categories for all genders on the brands page (deduplication is not possible). If you then click on "sneaker," for example, you don't know which gender you are going to.
For complex websites, let users choose for themselves what they want to link to the attributes (filters). The standard category tree seems best to me in that case.
Also, make categories, brands, and quicklinks dynamic. So if there are no active products from the brand or category, automatically disable them for the front-end (including the quicklink).
The brand page could also be much better in the default settings: navigate by brand by gender, meta titles and meta descriptions, search field in navigation.