Short answer: because their sites often have an older domain, more indexed content, better-structured product pages and more inbound links than yours. Google doesn't reward the brand that owns the product — it rewards the page best optimised for the query. Good news: those are technical gaps, so they're fixable.
A reseller or marketplace has been publishing for years and across thousands of products. That age and volume send Google an authority signal your site — newer or narrower — doesn't have yet.
Titles, descriptions, tags, customer reviews, structured data: marketplaces industrialise optimisation. Many brand sites, by contrast, have short product pages and near-empty category pages.
Comparison sites, articles, partners: the ecosystem points massively toward resellers. Those links reinforce their position on your own queries.
When your pages don't reference one another, Google struggles to understand which ones matter. The reseller, meanwhile, has a dense architecture that pushes its pages upward.
You're not losing for lack of fame, but for lack of optimisation. That's exactly what gets fixed — and the first territory to reclaim is your branded SERP (searches on your name), the quickest win. To quantify what this capture costs you: recover the revenue your resellers capture.
No. As long as they sell your products legitimately, they can rank on your name. The answer isn't legal, it's SEO: take the spot back.
Not "force", but earn it: an optimised site, solid product pages, brand content, consistent entity signals. It's very achievable on branded queries.
On branded queries, often faster than on category queries. A diagnostic prioritises the quick wins.
Not on your own brand. On generic queries, you pick the winnable battles rather than fighting them head-on.
The Diagnostic measures the revenue captured by your resellers and maps the plan to get back in front, starting with the quickest wins. €290 (~$310), credited toward your first month if you continue.