He ought not state things authoritatively without studies to back him. In his experience it is as he said but his experience is hardly normative or conclusive.
Its the inevitable end state when you give anyone a mic and allow them to broadcast to the entire chimp troupe forever.
As Michael Goldhaber reminded us at the dawn of the Internet - people have limited Attention to pay to anything but unlimited capacity to receive Attention.
So he will keep talking. Less people will pay attention. And the more the algos promote his content the more the backlash will build.
The design principles of Who gets the Mic in a broadcast(1 to All) environment, who we pay attention too, and for how long are still a work in progress and have a long way to go.
You can't find any elected politicians who are that bad. Still I wish those folks would claw each other's eyes out.
And then, recently, he goes and posts that essay about how 'woke' is this huge problem just as a bunch of flagrant racists come to power.
https://www.vox.com/politics/397525/trump-big-tech-musk-bezo...