An old thread of mine about Webtoon ratings thread recently got necro'd, and reminded me of one.
Being told my comic deserved 5 out of 10 stars on Webtoon. That really stung... I knew what the person meant by the comment, and I'm certainly not pretending that my comic was flawless - there's a lot in those early episodes I intend to change, once I have the time to re-work them. But anything under an 8-star rating on Webtoon is an anomaly, and unless the comic is new and small, and has been rating-bombed, it usually indicates there's something really weird about the story and/or art. When the 'standard' low-ish rating is 8 stars, 5 is catastrophic. (If the rating system weren't so warped, I'd have probably agreed it was fair.)
I think they thought I was just trying to get attention as well, whereas I simply wanted the rating to go back to something normal-looking, so new readers didn't see the rating and assume something terrible. I didn't expect the thread to blow up the way it did, and I was pretty new at the time... Nevertheless, I wasn't expecting the comment, and it really knocked me about. More than the rating bomb did, since I know that was just a random Reddit troll, and this was a fellow creator.
It's water under the bridge now, but yeah, that wasn't a fun day.