I'm always amazed to see claims like this, given it's not how my world works at all. Picking some random popular favorites: searches for (verbatim) "Loki", "Hunger Games", "Oppenheimer", and "House of Usher" all return a wikipedia entry in at worst the second spot (generally behind IMDB, though Oppenheimer and Usher showed the real man and the short story ahead of the films, not unsurprisingly).
I mean, sure, there are glitches with all products and nothing is beyond criticism. But "Google buries Wikipedia results" is just beyond weird. It really seems like HN is starting to develop an "alternative facts" syndrome, where the echo chamber starts driving collective memory.