This quote by antirez suggests they did made core contributions. Also the events you’re bringing to light seem to be rather old and not relevant to the theme. Being self-entitled is a bit cringey, though.
[1] https://groups.google.com/g/redis-db/c/PxFeA0fHgO4/m/zD4IWbX...
But it kinda (definitely :D) misses the point that it itself set up at the beginning with the fancy FRED graphs ... almost in the same way as the author misses the point of (and thus the required choreography for successful) interviews.
(As others comments here mentioned that he seems to lack the self-awareness to correctly position himself on the bell curve meme, which gives him a lot of consternation.)
Strong opinions are great when you know when to deploy them :)))