I think if you can't find something good to say along with the bad, you probably shouldn't be writing a review about it, since its obviously not your kind of game.
As long as it has some valid points, I don't see a problem.
As long as it isn't just, "this game sucks, don't play it".
Yeah, well, I'm not sure I agree with it either. I only mention it because I don't like to see reviews which were made for the sole purpose of bashing the game in question. I think if you can't find something good to say along with the bad, you probably shouldn't be writing a review about it, since its obviously not your kind of game.