I am not sure what the intention of this post is. In my handpicked results Kagi far outperforms Marginalia. #1 "Gordon ramsey" (misspelled "Gordon Ramsay"). Marginalia shows "The Life I Imagine: are my cheeks red?". Kagi corrects to Gordon Ramsay and shows relevant results. #2 "Ukraine war". Marginalia shows an article about the Russian Orthodox church and a Substack post about the war. Kagi shows Wikipedia, Al Jazee…
I don't disagree with your assessment in full, but I don't exactly consider wikipedia and Amazon good results. Like they are big enough that if that's the result I want I can go to them directly. So like they aren't bad or wrong, but I can see the case for excluding them. Should something like Webster's dictionary be a top result?
That's bad if you're looking for a simple answer or basic fact, and good if you're looking for a few hours of reading.