First, the "I don't look too kindly" just sound too funny, I'm sorry, you make it sound like you're a mod giving warnings instead of just one poster, lol.
Second, I do agree the response they were given wasn't too good. On the other hand, the poster
derailed the entire NWH thread about their feelings on Spiderverse and Spider-Gwen a few months latter, so clearly they didn't really come out of the interactions here
that traumatized, which makes me far less sympathetic to whatever plight they faced. There is a difference between having criticism of a movie, and doing everything you can to inform people of your opinion any chance you get. It feels more like they were borderline obsessed with making it known how bad they thought Spiderverse was.
If someone can't express their opinions on a popular thing without sounding caustic about it, they then shouldn't act surprised when they get flack for it to the point of just leaving. At some point, some people are just hating.