New Users creating New Articles

I disagree with you about "articles about trivia". One man's trivia is another woman's hobby, and if it meets notability, it's not trivial. Moreover, in some cases it seems to me the notability guidelines are too strict; many academics only meet them once they die, when obituaries become available, even though they are major figures in their fields.

I agree about the rest though.

One question is what is perceived as "nasty edit summaries". I recently observed a non-native english speaker edit warring on english wikipedia about grammatical correction made by a native speaker, who as it happens writes extremely well. I don't remember the edit summary used by the corrector, but it was probably "copy edit" or similar.

Re: edit summaries - when I correct what I think is a grammatical error, I try to link to a Wikipedia article that explains it, such as Dangling modifier from the edit summary. Links are especially necessary in edit summaries with Wikipedia jargon or shortcuts. Unlinked jargon annoyed me when I was a newb, especially after I learned how easy it was to link. I realized there were other editors who couldn't be bothered to make themselves understandable by typing a few extra bracket characters. So I vowed not to make the same mistake too much.