The AI Overviews are... extremely bad. For most of my queries, Google's AI Overview misrepresents its own citations, or almost as bad, confidently asserts a falsehood or half-truth based on results that don't actually contain an answer to my search query.
I had the same issue with Kagi, where I'd follow the citation and it would say the opposite of the summary.
A human can make sense of search results with a little time and effort, but current AI models don't seem to be able to.