I don't see how any of this is difficult. Ban illegal content, period. Not that that's hard, it already is.
And leave the rest alone. Gore/graphic content -> filter with a toggle for those that want to view it. Bullying -> does it cross the line into an actual law being broken, if so, then ban it. Makes sensitive people nervous, uncomfortable and angry -> leave it be, but if you really wanna go far stick a sentiment analysis thingie on it and allow people to selectively filter it below their own threshold. There is so much that can be done simply, without breaching anyone's freedoms and without teetering into Orwellian 1984 conspiracy territory about wide-scale mind control and opinion shifting.
The problem comes when people naturally express themselves, it makes <insert group here> uncomfortable and it inconveniently bubbles up the rankings. E.g. I bet you right now that 20% of the entire american internet population simply doesn't like Biden and would mock him for his, probably innocent, old-age antics. But if that opinion were to "manifest" into some sort of catchy "Biden is old and sucks" hashtag or meme that needs reporting, well that's uncomfortable for TPTB, or the elites, or the media or whatever you wanna call it, and must be stopped. The internet is the ultimate direct-democracy tool we have right now, and it's being manipulated precisely because it breaks "representative" democracy.
Another uncomfortable topic: trans people in sports. It will absolutely blow up in one direction if people were organically allowed to organize and find others with similar viewpoints. Instead, they're banned, scared into shutting up, shadow-banned, or worse cancelled and doxxed.