Earlier quoted context omitted.
Could you spell out how the link you shared says anything about "year on year decrease" or anything about the movement being viewed as "despicable". Especially in the context of your very reference saying that the results depend significantly on how the question is phrased?
Ask yourself if you or other people would be more comfortable identifying as feminists publicly now as opposed to 5/10 years ago; that'll give you answer 1. As for answer 2, I've shown what basic searches can come up with. "why im not a feminst" might give you what you're looking for.
Answer 2: So I did the Google search as you requested, and read about the book [1]. I hadn't heard of it but it looks interesting, thanks for recommending. From what I can tell, it's central claim is that feminism has an image problem due to it being co-opted by the US right-wing which she calls "choice feminism", and the remedy is a need to return to a leftist concept of what she calls "radical feminism". Is that what you're saying?
[1] https://www.amazon.com/Why-Am-Not-Feminist-Manifesto/dp/1612...