Why are Medium recommendations so awful?

My Medium homepage is an excellent case study in how NOT to build a recommendation engine!

I keep being recommended stories from two blogs, “The Mission” and “Personal Growth” and I’ve been uninterested in most, and dissatisfied with the few that I’ve read. (They are pretty much just article-versions of the sort of the overly-earnest claptrap you see on the self-help rack at an airport bookstore.) I’ve repeatedly clicked “Show me fewer stories like this”, and you’d think that after doing this, again, and again, for stories from these two blogs, I would no longer see suggestions from there; the source of the story seems to be a pretty obvious thing for the engine to “trigger” on to me…