I understand your position. If I were in your place where someone else posted my personal (?)/hobby project on a public forum where it got discussed more on the point if it was LLM generated or not rather than the more interesting technical bits, I would also be frustrated.

Regarding the writing style, it's unfortunate that LLMs have claimed a lot of writing styles from us. My personal opinion is to avoid using these AI-isms but I completely get that for people who wrote like that from the start, it's quite annoying that their own writing is now just labelled as LLM generated content.