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 IPNo Safe Zones Just Survival Chaos
I found a semi vanilla plus survival server that is all about danger. There are no claims so your stuff is never really safe.
PvP is always on and there are no safe zones. If you want chill building and protection this is not that kind of place.
It runs on version 1.21.11 and it is located in Europe. The whole vibe is basically fight for your life and make your own safety.GG.MINEWIND.NET New Server IP2 Paws 1 Job TRUE ANARCHY
I found a 2b2t style anarchy server called 2 Paws 1 Job and it is all about true no rules survival.
It runs on 1.21.11 and it is on dedicated hardware. They say it is built to handle 500 plus players with no lag.
There are no resets ever so whatever happens stays. Dupes are allowed griefing is encouraged and pvp is always on.
It tries to feel near vanilla with custom plugins and there is no pay to win and no protected spawn. You can join instantly with no whitelist and it supports Java Bedrock MCPE and cracked clients too.GG.MINEWIND.NET New Server IP