Regrettably, I don't think there's a good middle ground distribution that's anti-AI. It's either very technical distributions like Chimera and Gentoo or opinionated distributions geared towards newcomers like elementary OS or more specialized distributions like Nura (formerly postmarketOS) that are explicitly anti-AI.

I think your best bet would be to go with elementary OS, honestly. It uses its own DE, Pantheon, rather than KDE, but I think it's easily your least worst option. I've never used it extensively myself, however.

Of course, I also am obligated to mention that the Linux kernel is extremely pro-AI. However, an anti-AI Linux distribution is leagues better than using, say, Windows when it comes to AI.

That being said, here's a list of distributions known to be affected by AI as well as those that are anti-AI.