I think it's normal. Poor food may mean many things and most of them are not malicious. But being treated rudely or uncaringly? You deserve your bad review.
>Poor food may mean many things and most of them are not malicious.
I honestly feel the same about poor service. I'm usually accommodating and understanding, but I'm no monk. Of course there are times when I feel either the poor food or poor service merit some mention.
Most of the time, however, I think "they're human, going through human things. No big deal."
It's interesting that your main criteria is how you feel you were treated, though. Discussed in the article:
"Restaurant reviews in which people sound traumatized by perceived injustice don’t tend to comment much on the food — it’s usually the perception of being treated rudely or uncaringly that seems to have pushed people into processing by writing out their feelings in a public forum."