Big question. No perfect answer. Moving things in the right direction would likely require a multi-faceted approach that would include education, technology, and legislation (listed in descending order of importance).
I think education is far and away the most important of these. Ideally legislation would mostly be needed to fund research and education with respect to the relationship between technology, communication, psychology, culture, and public institutions such as government.
To be honest, I agree with Cal Newport that everyone should quit social media. I'm all for a peer-to-peer system that allows me to stay in contact with my friends. If this same thing were used for sales and marketing, it would be equivalent to something like using the Tor browser on the dark web. I don't know anything about this.
Thinking back through some products I just bought or wanted to buy, social media played no part in them. I ordered a Mayhem through Catalyst. Someone on here recommended that to me. I ordered another board from a local shaper because I got his business card through another guy in the parking lot and called him up. I went on both these guys' (Mayhem and ADS_Surfboards) instagram and didn't get any of the information I needed. It was useless.
As an online storefront, Facebook sucks. To find customers, it probably sucks too since most are in a certain demographic (older).
YouTube is becoming like the Home Shopping Network where everyone is trying to monetize their relationship with brands by gargling the balls of the brand and giving uncritical reviews. I also use it for DIY advice, but this is disappearing more and more as content creators realize they're not going to make money off of YouTube (LOuis Rossman and Eli the Computer Guy talk about the bubble bursting). The alternatives (Bitchute, Library, MInds, etc) have some interesting talking heads and some DIY but a lot of kooks and a weird interface.
Twitter is a fever swamp. I have no idea why it exists or how it makes money other than through 3-letter agencies at home and abroad. Great for COINTELPRO, not much good for anything else.
OVerall, social media is useless and a form of digital sharecropping. You can educate people on its use but that education would have to somehow make users more moral and ethical. That has a huge "Last Mile" problem.
Search engines are probably the main thing in need of trust-busting. Everyone else can host their own site and let the search engine crawl it. If Google is the monopoly and its search results are getting a lot worse (they are), the customer is harmed and needs alternatives.