We can't really stop people from rating all Warrior Cat storygames as terrible pieces of crap that deserve to be set on fire.
We can't stop people from giving undeserved ratings like that for anything else either.
If they don't deserve to be rated as such, then we could only how that people care more about plot, writing skill, and game aspects than hating on a particular subject matter and rating all the games for points.
That being said, I really wish people would stop reading and rating storygames that have subject matters that they hate, unless they're going to rate objectively. The downsize of trophies and points is that there are people who will flip through a storygame they know they won't like and go in with the notion that no matter what the storygame is getting a crappy rating because it isn't their cup of tea. It feels like going to a concert for a genre of music you hate and expecting to have a terrible time, and then complaining because you had a terrible time.
I don't particually like Science Fiction, but I don't go rating all the science fiction storygames indiscriminately as terrible because they don't fit my tastes.
Warrior cat storygames that are of decent, good, or great quality will probably suffer from this type of rater/reviewer. There are some people that will look at any Warrior Cat storygames as terrible because they have no interest in the content.
However, we can't stop people from rating things poorly, regardless of quality, because we can't force people to be objective about things.
So we're pretty much stuck with how things are.