They really have gotten worse and it's incresibly frustrating that DDG seems to ignore the Infosphere (and WikiSimpsons) entirely in favor of the fandom sites.
Trust the search engine to do the signal/noise calculations for you. You are no longer on Google. Kagi is your agent, not your adversary.
Only sites I block on my Kagi are sites that outright trick or lie to the user; keyword content farms, pinterest, and StackOverflow cloners
I found it through Libredirect which is the same idea but for more sites, but some of the alternative sites don't work as well in my experience.
There's also a 'ublacklist' extension which lets you block sites from search results as well. I think this edits the results to erase matched sites, though - you're not communicating to Google, et al. that you don't want to see that site.