I found a Minecraft anarchy server called MinecraftOffline that runs on 1.21.11 and it is all about doing what you want.
The world is eternal and they say it never resets so your builds and mistakes stay forever. Gameplay is enhanced with bespoke plugins so it is not just plain vanilla.
It is hosted in Finland which should feel good for European players and it is built on reliable hardware so it should stay stable when you are trying to survive the chaos.
Stable EU Anarchy No Resets Ever
GG.MINEWIND.NET New Server IPAustralia Vanilla Anarchy No Rules Ever
I found LegacyMC and it is a raw vanilla anarchy survival server. It is an open world where players do whatever they want with no rules and no admin interference.
There are no resets and no land claims so everything you build can last or get taken. There is no teleporting so you have to walk and travel the hard way.
PvP is on and griefing and raiding are allowed. The server runs on dedicated hardware in Australia so it is made for low lag for Australia and New Zealand players. It also has no pay to win and no monetization and donations are not required and will not be asked for.
It started in June 2025 so people can still make a big name for themselves. There is no whitelist and no applications so you can just join and play.GG.MINEWIND.NET New Server IP