Trying to mass censor user generated content in real time and not causing censorship of speech from outside the UK isn't going to work. The only way they could stop anything they dislike is to abolish social media and implement a new internal national network that is wholly controlled by the state for residential use. We've seen the UK police website being blocked to those outside the UK. In the future, it could be physically blocked (making VPN's useless) and only available within a UK Intranet. Which I think they will do in the long term.
An update to a previous post I made also mentioned in the link, the first arrest for "inaccurate information" was made to a prominent critic of the UK Government, someone who was critical of vaccine mandates, lockdowns and face masks - Bernie Spofforth. From what I understand, she is just the first of many who face arrest as these plans will now make social and communication networks legally mandated to report what the state deems to be dissent, lies and harm to law enforcement.
This law introduced by the Conservatives will bite them in the backside as it will be used against those creating electoral communications that are critical of the ruling Labour Party. It's going to be very difficult for anything critical of Labour to be published as anyone who does faces arrest.
Labour will also likely make VPN use outside of business and Government illegal. They attempted to push an amendment to the Online Safety Bill to this end but it failed. Now they have a large majority and a new opportunity to ban them for good.
Another thing that came about in the last couple of days, the renamed Counter Disinformation Unit who targeted those critical of Government during Covid-19, the National Security Online Information Team, are now targeting those critical of Government who are on the right wing.
TL;DR - the UK now has a literal Ministry of Truth.
Social media allows brainrot. There are other options that don't require going full attention whore and/or narcissist telling the whole world your daily life that few even ever ask about but that's where basically ever single platform has moved to because it generates money from idiots/normies and ads.
Look at the jokes that get made about how any country trying to ban a social media platform would have people complaining they can't spend all day on said platform. It's both tragic and pathetic that's how some people spend their lives and the world as a whole would be far better off without social media as it is.
Is how some put things, but in agreement with your point it does mean getting the signal out there is far easier so a more nuanced approach such as:
could be better and very well solve one of the great filters of civilisation that prevent things turning out like Idiocracy.