A Wikipedia deletionist resulted in a movie going without an article for months, despite my efforts to at least give it a stub page. The film was by no means an obscure arthouse production or anything like that, the not noteworthy objection was pure nonsense. Someone other than me eventually won that battle.
A StackOverflow deletionist deleted my question, fortunately after I got a decent answer, on the grounds that it was a duplicate of an existing question. The explanations in the answers were indeed similar, but the symptoms were quite different, especially from the point of view of someone who doesn't already know the answer. (It turned out I had made a false assumption about the way parentheses are treated in regex. Unlike in many contexts in many languages, it doesn't only affect precedence.)
Then there are also the people with ideological axes to grind, and the community's seeming belief that it's fine to merely reform a problematic user to just the barest level of acceptability.
Unless you find some forgotten corner, being a Wikipedia editor requires an inhuman level of patience or obsessiveness, which probably ends up turning off a huge number of potential contributors.