Avoiding Google Search is already a sign of being at the more radical end of the spectrum IMO.
I don't think avoiding big tech is really possible without joining a separate offline society. You can reduce it but you're not going to keep your kids offline without their friends also being offline.
I have hundreds of friends both IRL and online, hang out with lots of different people every week, have piles of hobbies (many involve tech), and run a b2b company serving major silicon valley tech firms.
I also don't have a smartphone and I almost exclusively use open standards and open source software, most of which I self-host in a rack in my closet. The only way I can be reached is e-mail and matrix.
You do -not- need a smartphone or FAANG to live a rich technical life in 2022 though many in the US sure seem to think you do. In the USA, you go to Defcon and see google/apple/discord nonsense everywhere. Even the privacy village (ugh). Go to CCC in Germany and you will see thousands of people gathering and exchanging ideas with only open software and protocols, because they don't trust US big tech.
The fact so most in the US, like you, think that app culture and surveillance capitalism is required to thrive in our online world is evidence of some very successful marketing.
I'm in Berlin, Germany. Can corroborate that people here distrust bigTech to the point of not using it.
It's a big question for our generation. I posted this using a gemlog in gemini: protocol but it has an html proxy so that 'the world' can see it (I'm glad I did, I don't think we are to the point where posting a gemini: link works, even in HN, to get some attention.
Can you live, and market your business/services if you don't use social media? I'm betting you can, but I don't have data.
I have 1000s of twitter followers on company and personal accounts, but I rarely tweet anymore. Is it costing me business? Perhaps.
I don't think avoiding big tech is really possible without joining a separate offline society. You can reduce it but you're not going to keep your kids offline without their friends also being offline.