Lemmy bean posting could be a reddit counterattack to get people to return to reddit.
I don't know how I didn't think of this be for, but the Lemmy bean posting could be a psyop that reddit is trying to get people to return to them after switching to Lemmy
It sounds like you want to block [email protected] and other 196@___ communities (where the "'rule' shit" people live). For kbin there should be a block button just next to the subscribe button for a magazine.
Alternatively you could set your home page to "Subscriptions" instead of "All" when browsing - for kbin the option is currently at the top of your Settings page.