You do know there's anarchy servers in newer versions, right?
Yes. Either they have to remove the chat signatures with a plugin, or probably with PaperBin which is now alot of them or their community has to stop saying easily relatable things. Also, try to be a little more subtle in attempting to insult someone's intelligence 
And 2b2t is probably gonna update soon.
After 5 years of staying on 1.12.2, sure. It would be very easy for Hausemaster to update to 1.19 and develop a plugin in the background that removes the 1.19.1 chat signatures himself which I believe is what he usually does.
Mojang Microsoft doesn't own third-party servers
No. Of course they don't. However, they own the Minecraft Client and Bukkit (although Bukkit is stagnant), so they're free to do whatever the hell they want to within the boundaries of law.
and the servers are usually moderated very well
Yes, most of them are. However, in my time I've seen some absolutely deplorable people on Mojang and the most that's ever happened to them is being banned from a few servers. There's nothing preventing someone from Doxxing someone, getting banned and doing it all over again. This system has been put in place to prevent heinous people like that from affecting as many people.
Even if the servers aren't moderated as Microsoft wishes, WE are in control of OUR servers.
No. You absolutely are not. If you do what most people who run a server do which is to download Paper, install a few plugins and change a few settings, you're entirely at the whim of who develops the server and the plugins not introducing some backdoor or equally stupid shit you don't want.
If you want to truly be in control of your server, you need to either develop your own server software from scratch or rely on a maintained open-source (so you know what the hell they're actually doing, unlike Minecraft + you can fork it freely) project.
To be completely honest, I ended up not caring about what Minecraft has been dishing out since 1.16\~. The fact that I can't even remember what each version gave beyond 1.14 should really be a telltale sign that Microsoft is just pulling updates out of whatever dumpster they find. Staying at 1.17.1 is the best we can go for, since that version doesn't have the report system, thus no bullcrap. If this bleeds into older versions too… I dunno.
The game has argubaly decreased in quality since 1.12.2 or maybe even 1.7.10. Both performance and feature wise.
However, the drawback with using older versions of the game is that they're often vulnerable to security issues (i.e. Log4Shell although this is sorta mitigated but not really in most launchers), crash exploits and general bugs that were patched in later versions.
Thus, that's why I choose to always use the latest version of Minecraft with a few mods to improve performance and maybe even ViaFabric/multiconnect (depending on if EarthComputer had updated in time for the new release).
I would also like to state that most of the anti-chat reporting content on YouTube and other platforms like Discord seem to mostly be FUD or just not understanding the topic at hand. For example, I saw some mod developer who doesn't seem to know what he's talking about falsely claim you could be impersonated, which is quite literally impossible unless you zip up your profilekeys folder and send it to the attacker (or install something that allows the attacker to do that themselves).
The only good chat reporting related video I've found is the one by KennyTV, a Paper (the server software Scissors is forked from) maintainer.
Your chat reporting is only as secure as your system and as such it's entirely your fault if someone gets ahold of your private key.
I'd like to address the claim that this somehow invades your server privacy, which is entirely untrue. Reporting is only executed at the behest of a player, Microsoft/Mojang will have absolutely no access to the chat messages you send unless a player decides, of their own volition, to report them to Microsoft/Mojang. As such, it's akin to the player screenshotting your chat messages or reporting them through a server-controlled moderation system.
Lots of people seem to think the system is entirely broken and I don't think that's entirely the truth. Making the client sign chat messages is quite literally the absolute best way you could prove the authenticity of messages. You know what would happen if a company implemented literally anything else? You'd get a situation akin to the recent false-banning of ROBLOX players who joined specific games which pretended to receive chat messages from the client (which are unsigned fyi).