Just to add on here. Privacy ended about 60 years ago, when the federal & state governments, financial institutions, and retailers started with the UNIVAC... and moved onto other mainframes and minis. Machines from Sperry Rand, IBM, Unisys, Electronic Data Systems (EDS), Computer Sciences Corporation and of course "BUNCH" (Burroughs, Univac, NCR, Control Data, and Honeywell). What were they doing with these systems? Today we call it data mining.
If you walk into a 7-11 and buy a Slurpee with cash, no... that purchase isn't tracked, but you will be on camera. But you walk into your local water utility to pay the bill, even with cash (if they take cash)... it is tracked. Your SSA card, driver's license, voting selections, census answers, credit/debit card transactions, what you bought, what you financed, banking signature card, online activity, what you listen to and watch, even where you drive your car (if it is a '96 or newer) can and is tracked.
No, the government doesn't sell your information... but they know which hand you wipe with. The banks, credit card companies, and retailers... yes, they sell your information. Have been for many decades to mass mailers and telemarketers. To business so they know what to produce and how to market it to you. How to market and advertise it.
Now big tech companies are doing the same thing. Is big tech getting more info? Not really, because they share it with the same people who've always been collecting it... they are just doing it faster, cheaper, and more efficiently. Are bad guys taking advantage of this? Certainly, but the bad guys aren't new either... and the good guys know that.
Nothing wrong with choosing not to use social media, it is a legitimate personal choice. But believing that not using social media protects your privacy while still using the Internet and web... is mistaken. The same type of search bots that spider social media... are also spidering Stratics, and every single site on the net that you visit. Every site you go to tracks you and sites you've been to with cookies, your ISP tracks where you go, logs your IP and MAC address.
So long as you function in life, not just on the net... you're a known quantity. You can't stop it, but you can learn to use control settings in sites and services to minimize the risks.