One thing I didn't notice OP mentioning is whether he was using a VPN or not. Of course that would make the suspicion level spike in any spam classifier.
I've been accused of using AI by Redditors as well. I am unsure of what caused it, but I was banned in December with no warnings, no reason, and with no response at any of my appeals. I still have no idea why I was banned.
reddit is no longer what it once was. it is now an ai-content-generation farm. It years ago abandoned its original ethos in favor of ever more fascist tendencies such as this - the unilateral silencing of individuals without cause or recourse is just one of many. There are outright bans on opinion. The overton window is now enforced via LLM.
The anti AI slant is hilarious since the whole site is mined for AI.
And all the content generates actual revenue and you, the content generator, get abuse for your trouble.
The whole of everything is mined for AI. The decisions of the site owners to profit from the mining aren't necessarily the views of the contributors.