That's probably true for everything about how he runs Twitter. It's his personal platform now, and not a public town square anymore. He makes up the rules to suit himself, and he'll enforce them the way he wants.
most of what you say is spot on, but lets be clear:
twitter has never nor would it have ever been "a public town square"
anything owned by a private company is the literal opposite of a "public" anything.
and way more importantly, anything with a character limit of 280 characters is absolutely thoroughly inadequate to discuss the most complicated and nuanced subjects that philosophers have been wrestling with for centuries with entire tomes and libraries worth of space.
I completely and wholeheartedly agree. These companies always love to present themselves as a public space, while simultaneously leveraging their control over it.
And I definitely prefer social media that support long form posts and contextual discussions instead of these weird loosely linked twitter threads.
While “anymore” may be out of place, I believe OP was referring to this (among other similar quotes): Musk said the reason he acquired Twitter is to have "a common digital town square, where a wide range of beliefs can be debated in a healthy manner."