Lately I have been mostly angry about a couple of cases when I wanted to rectify an error on a page about something I knew a lot about and it was too difficult.
I uploaded 2 articles on people who deserved an entry, in my opinion.
One was a "B" actress from the 1930s-40s who was my second cousin (my father's first cousin). She chose a rather bland screen name, so finding and cross-referencing her is difficult for someone who does not know. She died in the 1950s and my father died in the 1990s, so my information, while excellent, was not all easily verifiable.
The other was a 2nd-tier writer (at least half a dozen books and several dozen magazine articles) who grew up in my home town and went to high school with my mother. I was not allowed to use a photo taken by my father, since I could not prove that I owned it legitimately.
In both cases, the articles were allowed, but edited, and I got a torrent of questions and criticisms from the moderators. I understand that there is a need for accuracy and cross-checking, but I see it as a work in progress that begins in the prototype stages and grows and evolves over time.