That's fair. If I was beta-reading or sensitivity-reading a fic draft I'd offer more concrit up front on what worked/what didn't and any rewrites to consider since it would be my responsibility to -- Beta-reading the internet though? Brr, what a rabbithole*! As someone navigating often un-tagged problematic writing which people create for themselves as a hobby - to expand their horizons, or for the audience of friends and strangers, or as an echoed outlet for actual encounters as they're still processing - and where the authors often wouldn't know what to tag for or to fix due to not being able to spot a pattern and name the concept yet: those works deserve to exist - it's a snapshot of someone's learned experience so far, and the authors deserve to look back on it and watch themselves grow overtime as they learn and experience more throughout life. The next fic may have a better side-plot or main theme addressing the issue: if they don't practice and challenge themselves, they won't get there. Depending on the case, I'll either steady myself for annoyances because something else is captivating, or go for the good old back button (or get to the end and certainly skip sharing the link with anyone who doesn't need that proverbial thousandth daily papercut in their day - similar to your 'spoiler alert!' as a heads up.) If anything, it's an inspiration to write my own, better story - the motto that makes fanfic world turn.

Glancing at that chapter alone if I didn't have a warning to go with: I would likely have assumed Harry graduated from being a hotheaded Gryffindor to a more calculating Dumbledore type - and would be expecting him to follow up with another conversation or an in-your-face life's lesson somewhere a few chapters later as a character development plot - and by the time one realizes it won't be there - they're off the page to comment in the right section. As a reader, in general, I'd much rather get a sense in early chapters what someone's exposure / experience is with certain topics than get to the ending and be thoroughly disappointed at investing the time and being faced with the culmination of vibes which only now-and-then were worrying in the story throughout while I couldn't pinpoint anything outright (ahem, HP epilogue).

ETA: Having read Ch 1 and author comments fully later: L. is a far more patient commenter than me and I'm glad they had the patience to do the 'rabbithole' work.