What happened here seems to be a variant of Poe’s Law, something like: "No matter what ridiculous things someone says sarcastically, there is someone else who says the same things, but is completely serious about them."
You really can’t blame people, who don’t know you at all, for not getting a joke, that could otherwise be a completely serious post. Had you said the same thing as a direct response to a newbie being demanding and ungrateful, it would have been a great joke, on its own, your intentions were not very clear.