Evan and co. just wouldn't agree to let you contribute to solve your problems and issues in the way you would have preferred?
(In re: the "harsh" comment you linked to, I don't know what to tell you. It doesn't read as "harsh" to me, if anything it shows admirable restraint. In any event, I'm not interested in "tone policing" Richard Feldman. I know nothing about him.)
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I'm one of those people who are like, if you don't like what Evan's doing just write your own, eh?
Meaning no disrespect to Evan and co. and what they've achieved, it's not that hard. It just isn't. Elm-style languages are pretty easy to implement (that's kind of the whole point, yeah?)
It divides the complainers into two groups: those who can write their own but instead prefer to leverage Elm devs via what amounts to various forms of emotional and reputational blackmail; and those who can't but still want to leverage Elm devs via what amounts to various forms of emotional and reputational blackmail. Either way, I personally feel comfortable dismissing their complaints without further consideration.
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Do you have any technical complaints about Elm? Did it ever break in production? What was the most interesting bug you encountered using Elm? That's the discussion I'd like to have.