If you use the “Most viewed” option, your search mimics what Google is doing a bit better (by showing you results that others also may have found useful)
“settings in themes settings.yml” puts it in 6th
“advertising plugin” puts it in 2nd
Not perfect, definitely there is room for improvement. But I’m not sure how realistic it is to compare search here to one of the most advanced search tools on the planet that is literally synonymous with “doing an internet search”.
That being said I think Discourse could be better even if it doesn’t ever get good enough to beat Google