If you just want a hassle-free way to view as much content as possible, there are instances that are federated with pretty much everyone - just have to do a little research. If you want to guarantee keeping post history AND have absolute control over what you can see, you’re gonna have to put in the work to make your own instance.

Also -

them: it’s ridiculous they aren’t listening to the user

the instance: held a vote and the majority voted to defederate

Have you looked into the process of actually spinning up your own Mastodon instance? It’s not exactly the good old days of throwing together a LAMP box and installing PHPBB on it.