Without proof, that's just as hyperbolic as the post you're criticizing.
The number of users on the internet went 5x from 2005 to now.
https://www.zippia.com/advice/online-shopping-statistics/
E-commerce volume went similarly steep and steady in increase.
https://siteefy.com/how-many-websites-are-there/
Number of active websites went up similarly.
https://en.m.wikipedia.org/wiki/Wikipedia:Size_of_Wikipedia#...
Wikipedia number of articles exploded.
I remember friends getting harassed online, where it was one of the few places they could be themselves (for instance, a good friend of mine was openly gay online well before he was in person) and the internet seemingly didn't take kindly to this in alot of corners (gaming for starters)
That said, they were able to find some community that didn't exist the same locally, so the vastness is the upside here in that respect.
You can't even really do that on HN without getting your account deleted. I don't think the blame belongs solely on Facebook and Linkedin so much as anyone who has any kind of power online using it on others as they see fit.
That said I also believe you are correct, even small degrees of power can corrupt and being granted power over conversation means your biases may lead to abuse if you don't agree with a view point or the person holding that view.
The old internet is dead and most people and organizations abhor the idea of anonymity and anonymous (free) speech.
Did you manage to keep your account anonymous from Facebook – that is, not linked to any of your other identifiers?
I prefer talking about pseudonymity rather than anonymity because you are very rarely truly anonymous on the internet, even using a non nominative handle, especially if law enforcement enter the chat.