Depends on how you quantify “how much”, what you care about, and what you’re willing to do about it.
There are many insidious assaults on privacy in many countries in the 21st Century. So many, that many people often spout the resigned/cynical truisms that it’s impossible to have any privacy “these days”, but that’s not really true.
Examples are endless, but to mention a few:
Mobile devices are optional.
Mobile devices have options.
There are privacy-centered operating systems (and hardware) for computers and mobile devices.
There are countries, and places (even within surveillance states) with much less (or practically zero) spying on people, even by corporations.
One of the most effective means at messing up corporate tracking, is to generate noise. For example. you can share and trade your store loyalty cards, use ones you find in the parking lot, use ones that haven’t been given any ID info, and/or fill out applications with fake info. You can use invented identities for many commercial interactions and web sites, where there’s no real agreement to be giving them your main identity.
You can also provide information using your actual main identity (and other identities) that is inaccurate. Volunteer fake information. Create social media IDs and content that isn’t really about you. Tag the wrong people in photos. Invent wrong background info to fill out your bio details sections. Etc.
When telemarketers etc contact you who that think they know things about you, correct their accurate information with incorrect information. When they have wrong information that there’s no actual reason to correct, don’t correct it.
You could also go to the various web sites that have information about you scraped from the web and so on, and provide and “correct” their information by adding various disinformation.
If you were really into it, you could change your legal name to something very very common – the John Smiths and Bob Robertsons can be pretty hard for many databases to tell apart and not get confused with each other, much of the time. Especially if you feed them several tips that are wrong about which information goes with which person.
Etc…