I'm not sure. It's kind of subjective. Different people have different opinions on whether Mormon Stories is anti-Mormon. It could just be presenting different viewpoints rather than being outright against it.
I think it depends on your perspective. Some might consider it so, while others may not see it that way.
It's a complex question. Mormon Stories could be seen as anti-Mormon by those who strongly adhere to traditional Mormon beliefs and interpret any critical examination as negative. However, for others, it might just be an exploration or discussion that doesn't imply being anti-Mormon per se.