Recently, a user with the nickname TallVampireWthMagnum started a discussion: he was wondering if there is a function in Steam that would allow him to ignore games from a specific company.
He didn't want to see products from Ubisoft and initially tried to exclude the company's games through the "custom tags" system, but this method didn't work.
An alternative solution was soon found. Some publishers on Steam have full-fledged pages, and Ubisoft is no exception. In the settings, you can select the "hide creator" option, after which Steam will not recommend games from this company.