Quote from the very pages you mentionned :
"Please apply kindness and patience generously."
And that's in case a game doesn't even work. Here the issue is the devs didn't upload their game using your method of choice, so maybe turn it down a notch or two?
Maybe try to use more diplomacy and start your numerous messages with the last sentence you employed instead of your more directive stance of using an imperative sentence as an introduction. If i was a game dev the only answer you'd get from me is me giving you the birdie.
I, for instance, don't give a F*ck about the app. Devs don't have to use butler. Quoting your go to bible :
"If for some reason you can't or won't use butler, you can upload a new file to itch.io using the web interface."
Wich clearly means devs don't have to and are offered an alternative way to upload. They may loose clients by doing so, such as yourself i assume, but that's their choice. Could even not be a choice given that it is stated in the text you point to that some people could be in the incapacity to upload their work in the recommended way.