Spics ruined /a/
They are too malleable as an audience, probably due to their low IQ (https://brainstats.com/average-iq-by-country.html
). Most of them browse way too much social media and get heavily influenced by their content, so we get filled with normalfag faggotry and retarded opinions that they bring from twitter, reddit and facebook.
Every thread that has potential to have meaningful discussions about something just gets turned into a spamfest of extremely low quality shitposting (a very common practice in spic groups from facebook) or extremely shit normalfag tier opinions that are completely disconnected from /a/'s culture (spics who come from twitter or reddit tend to do this).
I'm not saying spics are the only reason YnS threads (or any other imouto/okaa-san/loli/CGDCT thread) get turned into a shitfest, there are other reasons too (like the massive influx of newfags after all the publicity 4chan got in the last 12 years), but I think spics are a major factor in this disgrace.