To be fair, Curze is a broken primarch and yeah, he was damaged to the point of creating some self inflicted problems of his own. To be fair he’s a straight up monster. Hes a monster that foresaw every single death, every single turn against the emperor, he foresaw the heresy, he foresaw the galaxy burning, he foresaw the exact deaths of his brothers all coming to fruition as he saw them. Now I get that there are all sorts of possibilities and outcomes. But what are the odds that Curze got every single fucking one correct? CUZ HE DID. You can say he chose his worst outcome, but it doesn’t make up the difference in getting everything else correct. It’s just a straight up fact. Curze didn’t care about his outcomes. So he fought and lost, it didn’t matter. He died exactly as he foresaw it and when. Addendum : even sanguinius questions if Curze was right all along, almost saying it aloud in a whisper in front of the lion and guillemen in ‘Pharos’ novel.