I do run it in docker. It used to work great until few months ago. Maybe my provider (Hetzner) ip triggers captcha. Tried tor proxy and it didn’t make much difference. Brave, Startpage, DDG - all periodically throw captcha / too many request errors.

Sadly SearXNG is plagued by captcha limit. Nothing I tried reliable works.

Sorry, I couldn’t manage to read the whole post. Anyway, you may want to try authentik 2024.6 or later. They “reworked proxy provider redirect” in that version. I find it much more stable, but still not perfect. OAuth works great though. Note that 2024.6 requires Postgre db upgrade.