What you can do: https://www.patrick-breyer.de/en/posts/messaging-and-chat-control/#WhatYouCanDo
Contact your MEP: https://www.europarl.europa.eu/meps/en/home
Edit: Article linked is from 2002 (overview of why this legislation is bad), but it is coming up for a vote on the 19th see https://www.patrick-breyer.de/en/council-to-greenlight-chat-control-take-action-now/
I have to strongly disagree, you overestimate what people know/can/want to do. Some, sure, but not the majority. They either stay ignorant or are too lazy. Just look at add blocker usage. I can not even imagine to live without them, but here we are, I am the tiny minority! Most either do not care or are too stupid or somehow happen to not know about them.