Those are not matters of freedom of speech, but the unhealthy amount of power social media platforms have come to possess. The problem is how they amplify and distribute disinformation because engagement = advertising money. Free speech does not (and should not) mean you get worldwide reach.

Any platform distributing 'content' over a certain audience size should be treated as a media company and subject to much stricter rules and some kind of ethical oversight - like newspapers used to.

I can agree with that.

Unlimited free speech could have been positive maybe 100 years ago. Strikes, protest, writing angry letters to your Mayor demanding change are all great forms of speech.

Posting some unhinged xenophobic conspiracy theory on Twitter for everyone to see and to get retweeted by the President of the US or the most powerful CEOs are toxic and corrosive forms of speech.