I found it rather enjoyable, but a click bait title will definitely get you further in this age of the internet
The article maaaybe identifies one or two minor flaws, but mostly demonstrates that the author didn’t understand the movie. The word “fugue” is not mentioned in the review, for one of the many big misses.
It reads to me like garden variety clickbait of the “Beatles didn’t have a single good song” or “the internet has done no good” variety.
"Bad writing" is not suprising or extreme, just an opinion. And "very good" is subjective — we're talking about movies here, i.e. art. This isn't a review of programming languages where there's an objective reality of pros and cons to consider.
I haven't seen Glass Onion, but I saw Knives Out and while it was a decent film, I think comparing it to the Beatles or the Internet is a bit silly. It sounds like you really enjoyed the film and are just annoyed that someone else didn't.