Your journal output might be too curated, I don’t see anything that would keep the display manager from starting up.
The only suspicious entry I’ve found was #185:
sddm[1596]: Failed to read display number from pipe
FWIW, it could be GPU related, but that really just is a wild guess.
Skimming search results onto the above error message seems to second your idea.
No:
https://vividmaps.com/average-body-hair-distributions/