I think it's too late.

https://european-pirateparty.eu/parliament-approves-chatcont...

https://www.patrick-breyer.de/en/posts/chat-control/

Your first link talks about a specific derogation approved by the EU parliament. It provides an exemption to the ePrivacy directive, which allows for (existing) searches for child sexual abuse material by major content providers to remain legal. Without this exemption these searches would apparently be in violation of the ePrivacy directive.

You can read the derogation here: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A... . There is a somewhat helpful first page that provides context.

Personally I think it is quite a reasonable derogation; the pirate party clearly disagrees.

Perhaps write letters to members of European Parliament explaining our concerns, then ask all our friends to do the same?

To make it a low-cost effort, we could (a) prepare a list of relevant politicians (b) create a template of the letter. Then our non-technical friends need only sign and mail this. And if we put this all up as a one-pager on GitHub pages, it's suitable for sharing on social networks too ;)

Turns out Patrick Breyer from the Pirate Party already put up a list of practical steps, infographics and EP members, see https://www.patrick-breyer.de/en/posts/chat-control/#WhatYou...