I wish we could as a species create a social media and communication platform not based on greed, addiction, micro-monetization, walled datagarden hoardism, and so on, but something above all that bullshit.
We did. It was called "The Internet". It was great, for a while. But you had write your own webpages and host the pages yourself, which was hard and expensive. Only nerds could figure it out and the only people who got free servers were academics. At some point, some rich guys in california realized that you could trade a consumers info for a "free" service. Regular people went online and found all these neat free apps and all they had to do was watch some ads. It wasn't the best, but it worked ok, for a while. And suddenly _everything_ was a "free" app. Then walls came up and we found ourselves stranded. Nobody could afford to leave the walled garden and nobody could afford to make a better option.
We are a bullshit species. Our collective well being is secondary to each era's power games.
With the amount of brain power and resources that exist today and the relative triviality of orchestrating social media platforms it would take, like two or three months of banging some heads together and solving this little nuisance once and for all.
To the great relief and benefit of current and future generations. So that we can focus on some real problems.
There's the Fediverse sphere of platforms that largely fit your ideals but fragmentation is a glaring problem that prevents it from much wider adoption.
Any centralized platform where data is hosted is going to cost an obscene amount of money to operate once it gains traction. So they need to find a way to monetize it in order to keep the lights on. Throw in some venture capital and you've got yourself yet another startup that thinks they can scale infinitely.
My biggest fear is Discord gating old convos behind a paywall like Slack. Discord doesn't do that because it is still technically a different product from Slack, but should monetization drives intensify I'm afraid that'd be one of the easy channels they are going to take a look at.