If you find an account from that server click on ⋯ on its profile, then select "Block domain". But only do this if you're really, really sure you never want to see anyone from that server.
(By the way, there are a lot of fun friendly bots on that server, I'm not recommend this block as a general thing. I recommend a lot of bots from there at https://fedi.directory/tag/bots/)
@akhansari@feditips No, but if you want to get rid of a fair number, I'd suggest blocking botsin.space since that instance is mostly serving bots (although I'll be moving my Mastodon there soon).