Other than a lot of people preferring the reverse chronological feed, I think the biggest complaint I see these days is the perception that the algorithm is being manually manipulated to promote/not promote certain topics and/or people.

Given that Twitter/Facebook/Reddit/Tiktok are the behemoths in the room that all have the power to sway public opinion by either promoting or suppressing information, I think they should be regulated so that any topic that was promoted or suppressed by the algorithm or manual human intervention should show itself on the content just like an ad does. "This content has been quarantined by [Twitter Staff / Automated Review] and is only available to those with the direct url." would be a perfect example of such a message.

From there, users should have control over if they want to see such quarantined content or if they want a "safe" experience that Twitter curates for them.