You can prevent entire domains' content from being visible to you by blocking domains

Check out the post by @Jonamerica here

For instance, if you didn't want to see anything from lemmy.ml you could go to https://kbin.social/d/lemmy.ml and click the block icon on the right side. (not an endorsement to block lemmy.ml)
You can manage your blocked domains from https://kbin.social/settings/blocked/domains