I have made a step-by-step guide so you dumb fucks can follow.
click on your username in the top right corner
Go to “Settings” and then switch to the “Blocks” tab
Type in the name of the community you want to block
Save your changes. That’s it! See it wasn’t so hard.
Time and screen space are limited. When I take a poo break, I don’t want to have to wade through a bunch of posts in a language I don’t speak or about sports I care nothing about. But at the same time I am open to new communities that I might not have imagined even existed. So I just leave it on all and block the communities/instances I’m not interested in. It was a lot of work at first, but it’s pretty nice now.