It's because of several factors. One is that people post here instead of in the game feedback or strategy forums about that stuff. Two because there are a lot of sore losers out there, and people who don't understand the issues of game balance (instead, they must win at any cost and anything else is "cheap" or "lame").
Others may have legitimate concerns, but maybe can't express them in the most eloquent way (or get flamed by others all the same). In any case, I sometimes agree, but then, that's the danger of having freedom.. some people will abuse it, right?