Organize politically, at the state level, at the federal level, whatever you deem appropriate and achievable.
Push for privacy laws, push for laws around data ownership. Develop a theory of "what should people own" and "what kind of behaviors should be prohibited by companies" and "what kind of disclosures should be required."
Develop a message and start hammering your reps, and get like-minded techies and community members to do the same.
Spend a lot of time doing boring and tedious things like building a coalition, and make this an issue that can be fought for and that people will spend time advocating for.
California's privacy law didn't form in a vacuum, and neither did the EU's GDPR, and neither came into being because individuals were switching their personal browsing habits.
None of that's a technological solution so it's the sort of thing we techies overlook, but that's how you do it without merely voting with your feet and doing individual actions that, on their own, have zero impact.
When techies start organizing around issues like privacy, security disclosure, data ownership, and stuff like this, I think we'll stand to do some real good for the world.