yup good recommendation is: noai.duckduckgo.com with being able to have the option to hide AI on images, as @lightingtoaster also stated.
as for SEO, Youtube, TikTok, not much can be done and I doubt there’s any extension or filters with uBlock/Brave to do so, however it could be possible for me to start maintaining a list of AI generated videos/slop/SEO Slop on those platforms that can be utilized on something like uBlock/Brave/Adguard custom filters and it’s a community curated one where they find them and add it to the filter unless there is already one. I’ll make my research with documentation if that’s a thing the community wants to see.