Opt out as much as possible.

If spaces like that irk you, stop going there. Limit your use of the Internet to when you're at home on your own network. Do we truly need to be browsing HN and other sites when we're out of the house?

Ditch the smartphone. Most things that people claim you need a smartphone for "in order to exist in modern society" can also be done via a laptop or a desktop, including banking. You don't need access to everything in the world tucked neatly away in your pocket when you're going grocery shopping, for instance.

Buy physical media so that your viewing habits aren't tracked relentlessly. Find hobbies that get you away from it all (I backpack!).

Fuck off from social media. Support hobby-based forums and small websites that put good faith into not participating in tracking and advertising, if possible.

Limit when you use the internet, and how.

It's hard to escape from it, but we can significantly limit our interactions with it.