The entitlement of users calling open source maintainers that try to limit the surface area of support tickets to the systems that provably 95% of users are on “user hostile” is always sad to see.
I reject your name-calling via a strawman, though I support the message.
A better way to describe it might be contributor-hostile than user hostile. In a typical open source project, opening an issue is considered to be a contribution, a pull request is even better. Try doing any of these and be prepared to be harassed.
It is a very toxic open source project. Sadly homebrew cask is irreplaceable.
At the time it felt pointlessly rude but now I realise that the man works for free, and gets to be the king of his own turf. Not all software projects need to be a direct democracy. He doesn't owe us anything.
Your point about project owners having final word is well taken, but in this case possibly also objectively correct.
That person has repeatedly been very curt with people as a matter of policy.