While I agree with you in part, social media isn't a "boogie man". Their data brokering behavior is harmful. ISPs data brokering behavior is harmful. Both things can be true.
There are actual data brokers in the advertising industry. Seedy companies who with a tracking pixel ( or just outright data dumps ) can give you actual PII data. Facebook ( and to and extend google, althought an insane amount of malware goes thru google ads,I’m sure you’ve gotten the “you’ve won redirects”), have been putting those companies out of business.
Both Facebook and google have a ton of flaws. Facebook has been super naive on some areas. But Most of the reporting on their “data issues”, have not remotely offered a real view of the industry, or what actually happened.
It was the other way around! You were able to use Acxiom/etc data to target people on Facebook