All these pseudo-old-internet sites are just like any other form of nostalgia. They only care about the superficial and miss the actual spirit of the times. It's like how when most people hear 90s nostalgia, they think of N64 games and Pokemon cards and Dunkaroos and that S thing we all drew, rather than the fact that many kids still played outside, 9/11 and the Patriot Act hadn't happened yet, etc. This is the 00s-internet equivalent of that.
If they really wanted to bring back the old internet, they'd stop injecting politics into every little thing and banning people who disagree with them, and they'd ridicule anyone who keeps doing that. Instead of social media clones they'd be building forums and imageboards, aka places where you can actually discuss things for more than a day. And they'd be trying to pull people away from propaganda platforms like Twitter and Reddit.