I mean, that should be everyone’s stance when it comes to online stuff, even for the fediverse as nobody knows if/when the server owner might go crazy or the host goes boom, people should always be ready to jump ship or to try a new service searching for something better

I was in an instance that was like that, but since they even made a post justifying their stance on keeping the federation with hex, I just jumped ship.
Not having to deal with ml, grad and hex is so much better.

To add to your comment: Blocking the instance at user level is pointless, it only blocks their posts,not their users, so you still have to deal with their bullshit and they post their propaganda at every instance that tolerates them so it makes its way to those who blocked it anyway.
The only solution is to defederate.