Have you tried Minetest/Luanti with MineClone2/VoxelLibre?
Privacy
A community for Lemmy users interested in privacy
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Look up "Luanti" as an alternative. Free game, better engine.
I would be mindful of the security aspects. It isn't bad but the connection is unencrypted and vulnerable to man in the middle attacks.
If I were you, I would just shutter everything about the account except for the Minecraft license. Especially because, if you create a new account to play Minecraft, Microsoft is eventually going to ask you to provide identifying information like a phone number anyway. (At least, this has been my experience.)
I don't think there's the best answer here, but that's what I would do.
I would like to mention that cracking minecraft still works great, and I doubt that will change anytime soon. You really won't miss alot if you delete it, but you are throwing away money.