I didn't vote the post in question up or down, but I would speculate that it was received negatively simply because the tone came across as rude.

There's sometimes a tendency in rationalists to observe (accurately) that our society overemphasizes politeness over frankness, and then to take it upon ourselves to correct this. Unfortunately, being human, we tend to do this selectively: by being ruder to others, sometimes to an overcompensating extent, while still reacting poorly to the rudeness of others. At least, that's an issue I've had in the past. Your mileage may vary.

My personal take on it is that keeping to the standard level of etiquette is less trouble than the alternative, especially when trying to function in a conversational setting with a wide range of people. The metaphor of apparently unnecessary politeness as a "social lubricant" of sorts has been helpful to me in this regard.

But as I said, I'm only guessing here. I think you'd be within your rights to simply stop caring about the votes you get, be they positive or negative. Just be aware that you may be giving up on useful feedback information that way.