I mean, exactly how invasive are default operating systems? (Like Windows, Mac, Chrome OS, Android, iOS) Do they log your keystrokes, log passwords, capture screen, upload your photos, videos, or audio? (Assuming you aren’t a target of government) Is it even possible for the average person who doesn’t feel comfortable messing with installing operating systems to have any privacy?
You have some margin to work with. Of course it’s not going to be as effective than switching OS but you can use privacy focused firewall. For example Portmaster on windows or tracker control on Android.
These firewall will try to block as much telemetry as possible.
You should also be cautious about what you install on your system, opensource app usually have a better track record regarding privacy.
Thank you, I never knew about TrackerControl. I noticed it’s available in FDroid.