I mean you could try expanding your horizons a little bit and learning about other instances instead of being so scared of every opposing viewpoint on the internet. I promise you we aren’t anywhere near as bad as the libs across lemmy grumble about.
But like others have said there’s currently no built in lemmy way to do it. If you’re using uBlock Origin, you can go into the options (with the gears), go into the My filters tab, and add this line to the bottom:
It won’t exactly block it but it’ll filter out any Hexbear posts from your page when it loads so you don’t see them. You can replace the lemm.ee at the beginning with another instance and it should continue to work elsewhere, as long as there aren’t any major changes to the front end.
If you aren’t using uBlock then idk how you’re even getting through life.