People demanding Zuck be hauled before Congress to explain why No Kings insta was suspended... how would you feel if MAGA GOP hauled MSNow execs to explain why they covered Trump the way they do? Both are editorial choices protected by the First Amendment.
If this annoys you...
... the answer is to not use platforms like Insta, and bring communities to social media built on open protocols, such as atproto or ActivityPub, where the account holder has way more control.
Yes, it sucks that the No Kings insta was suspended (though I still think it was likely an automated tripwire, rather than deliberate). But falling back into "well we have to politically punish media execs to get better results" doesn't fix anything.
Devoting your social time to platforms where you control your own account and your own data, is the only real long term solution to hating billionaires controlling their own platforms.