I resigned since I thought my opponent was at least 15+ (probably 20+) points ahead, and I did not see any realistic way to close that gap.
However, my higher-ranked opponent remarked that he thought it was still quite close, so maybe I’m missing something or did not count correctly? Did I resign too early?
I count 20 points of diference so…
I posted a variation with my endgame, score guesstimator says W+11.5 . Manual counting gives W+ 16.5.
Thank you all for the reviews. I was getting worried that I had overlooked something and needed the sanity check. Even the (flawed) OGS score estimator was saying B+25-ish (albeit with white stones incorrectly marked as dead).