>>96130070 (OP)>Tell me which one is the absolute fucking worstA tie between the Deldar and the more lucid traitors like the Iron Warriors/Alpha Legion/Night Lords. Deldar for being sick fucks who willingly continue the disgusting hedonistic practices that brought about the downfall of their entire race, and are a scourge upon the galaxy as a result. The non-marked traitors for being more-or-less clear eyed and conscious of their betrayal of the Imperium, thus dooming the galaxy to ten millennia of decay. It's hard to overstate just how much suffering was caused by Perty, Alpharius, and/or Kurze switching sides
>causing the most overall pain and distress across the galaxyThe Imperium by a country mile. While most planets are probably somewhat pleasant places by our standards, those planets in no way represent the majority, or even plurality, of the population. Most people live on Hive Planets which make the Kowloon Walled City look like a paradise world, with probably the second most populous category being Forge Worlds, which if anything are worse. Servitors are a crime against any sort of conventional morality, the Administratum produces more deaths through incompetence than an Ork Mech, the Inquisition is hideously cruel, etc. ect.
>turning everything it touches into a rotting shithole of corpses, maniacs and bonesNurglites, easy answer there.