They didn't "approve" it, they closed their investigation, which they specifically called out as not saying there's no violation(s): https://www.ftc.gov/enforcement/cases-proceedings/closing-le...

That's right, they approved Whatsapp, everyone laughed at the instagram acquisition because they paid 1b and the company had 13 employees and 10m DAU. The company would be nowhere without FB.

Change has to start somewhere. Why not with the entity that is now admitting it was wrong?

Because it wasn't wrong at the time of the acquisition, IG as a company had 13 employees and 10m DAU, everyone was clowning on FB for wasting their money. The company would have went nowhere without FBs network effect, after all it's entire feed was based on pictures posted on FB. FB is just a political scapegoat just like Goog, if we were interested in antitrust we'd be knocking on AT&T's door and not giving them more grant funding every year.