It does sound like there was poor expectation management in terms of bug fixes, release timeline, milestone scope, etc. The author sounds like a domain expert w

It does sound like there was poor expectation management in terms of bug fixes, release timeline, milestone scope, etc. The author sounds like a domain expert with game engines but not a coder, so it makes sense they would not realize how wildly unreliable estimates can be. The point about a PR not getting merged and times when the maintainer didn't seem to understand core domain concepts does seem a reasonable thing to be concerned about.