There are very few sites such as Hacker News around. Looking for one that is similar in quality, but with a slightly different focus is going to be disappointing.

Perhaps it helps to consider why you'd exactly want this? You may be better off not visiting any such site, and instead focus on real human-in-the-loop activities with a group of local hackers.

I don't do web stuff, but I wonder if one could easily create a browser extension that hides AI-centric submissions?