I feel you... For 30+ years of my life I prided myself for writing without typos and other mistakes (without autocorrect), using lots of bullet points, dashes, and words such as "delve into" or "underscore".

Now I find myself intentionally adding typos and other msitakes, and using less sophisticated language, just to not be accused of using AI.

It’s been about 30 years since prose editors like word started underlining spelling mistakes in red. I don’t get typos when writing formal text in a keyboard. One handed on a touch screen phone with “auto correct” causing issues is another thing, but not for published articles.

I don't mind that in a "proper" text where it's actually useful and fun to read something with a flair. But maybe it has always irked people in short form (forum comments etc), but they've never just called it out until now? I do sometimes read something that gives me an "iamverysmart" feeling, as if the author used a thesaurus to find a synonym for half the words to sound clever but it just makes the whole thing incomprehensible.

The distinctiveness of LLM language comes from overuse of specific words, not because it has a particularly sophisticated vocabulary. Some of the words it overuses may be considered sophisticated by some people, but that's not what makes it identifiable (or what makes it grating). It's still not hard to distinguish your voice from LLMs by being thoughtful about style at all.

(Edit: corrected (unintentional) typo)