Google's search results have become pretty much useless for anything but like... how to videos and song lyrics. I know there are better alternatives out there in the year of our lord 2022, but I've been using Google since before it was a verb. Any suggestions?
Also, how difficult is it to build an open source search engine? I imagine it's not something that a group of hexbear coders could manage, but if I'm wrong... we could really use a search engine with an explicitly leftwing bias.
You should use an AI for detecting & excluding SEO spam farms.
Spam detection is extremely well studied to the point that it's often the textbook example of a machine learning classification task.
SEO spam farms can optimize against AI detection by training their content generators against the AI detectors. Ultimately you need detection algorithms that they don't know about, which are sufficiently different from the ones they do. That's best if it's an ensemble approach, since it's harder to replicate. Some of the detectors in there may be AI based.