If you take nothing else from this thread: That’s not “just autism”.
And the goal of working with a professional wouldn’t be to “delete your autism” like holy shit lmao that is so off base I would think you were a shitposter if I hadn’t met other people like you before.
There are dangerous thought patterns, shit that does nothing but erode your trust in the existence of an external reality. I don’t have the proper words to describe the level of danger to yourself and those around you that you can cause if you don’t believe foundational aspects of external reality.
This is really something you need to discuss with professionals.
You can block specific posters and communities, but so far keyword filtering is only possible through specific phone apps.
I think an instance admin was working on something for doing that natively though.