I think in an Au where Loki survived Thanos, somehow, it would only worsen his Cotards syndrome. Cotards syndrome is the walking corpse syndrome, where a person believes that they are dead or in some state other than living. The way Loki presents in A1 is extremely sickly, and Tom Hiddleston himself stated that what Loki went through was akin to the seventh circle of hell when with Thanos, there's no doubt if fucked him up permanently, coupled with the fact that it is cannon he had eating problems during his time in the dungeons, as indicated by Frigga ordering him more soup as she can tell he isn't eating, as well as his suicidal behaviour/tendencies, recklessness with his own life, shown when he himself decided to awake Surtur in Ragnarok and his behaviour on Sakarr, it's all extremely telling of something like Cotards syndrome. It's practically cannon that he's always had body issues, dysphoria and dysmorphia, add on finding he's a frost giant and possibly having a slightly lower body temperature, like that of a corpse (person hc of mine when he met Nebula or Gamora while under Thanos he shook their hand and they specifically remember his hands being cold and clammy, like a dead body) AND him quite literally having SEVERAL near death experiences I think it's pretty safe to say he sees himself as some kind of walking dead man.