I think it is practically impossible to go off the radar nowadays, there is too much information about you already out there, especially with the big guys.
I think the next best thing to do would be secure whatever you can and not give away anymore. Don't download unnecessary apps, give out information that is not required, and use your 2FA wisely. We end up giving out details these big guys never asked for without realising. Be aware of what you share.
The data privacy paradox is very real and I feel we are all guilty of it. There are a couple of reasons that come to my mind.
Firstly, we are short-sighted. We don't understand the consequences of our data being out in the open. Cybercrimes are so sophisticated that probably sharing a family member's email for a small gain is enough to put the entire family at risk of fraud. But at that time we only see the immediate reward, not the long-term risk.
Secondly, we are complacent. Because the scale at which data breaches, people have started feeling that they are going to get attacked regardless of whether they implement safety measures or not.
Privacy is not as important to people as we think it is. Small rewards lure them into sharing important data with ease.