Since this measure is imposed on ISPs by court order, I understand that complaining to them as an ordinary customer would be ineffective. As a non-EU citizen, is there anything I can do to push back against this kind of restriction on internet freedom?

Currently I've configured my home router to use mosdns [3] to rewrite DNS answers in the Cloudflare IP ranges to known-good addresses (e.g., chatgpt.com, medium.com). This works for now but will eventually be defeated by SNI-based blocking, which some ISPs are already doing.

[1]: https://vercel.com/blog/update-on-spain-and-laliga-blocks-of-the-internet [2]: https://hayahora.futbol/ [3]: https://github.com/IrineSistiana/mosdns