Unfortunately there isn’t one easy source that I’ve found. This is based on reading the stuff you linked to, as well as discourse/matrix discussions linked to from those sources. I compare it mentally to Guido van Rossum as BDFL of Python (though not any longer). He did a much better job of communicating expectations, like here
It made some people unhappy that there was no Python 2.8, but everybody knew what was happening. The core Python team also wasn’t surprised by that announcement, unlike with stuff like Anduril or flakes for the nix devs.
There was also a failure to communicate with stuff like the PR that would switch to Meson. The PR author should have known if Eelco broadly agreed with it before opening it. If there was a process that the PR author just ignored, the PR should have been closed with “Follow this process and try again”. That process can be as simple as “See if Eelco likes it”, since he was BDFL, but the process needs to be very clear to everyone.