alt Hacker NewsStarmer is about as left headed as a straight line railway across Australia. Corbyn was left (maybe).
cf. https://www.politicalcompass.org/uk2024
Even if you consider that page biased in whatever way - it's still useful for comparisons on the same scale. E.g. https://www.politicalcompass.org/norway2025
he is objectively left wing. People are over indexing on his controversies instead of looking at his policy platform as a whole. Also take into account that he is in a democracy the leans right on many un-impactful but hot topic issues.