"The good news is that while there are over a half-million “dislikes” on the Ghostbusters trailer, there are still over 27 million people who watched the trailer who either officially liked it or had nothing negative to say about it."
There are plenty of people that have something negative to say but don't voice it, at least on youtube, the worst platform for rational discussion.
Seems like they are trying to make a statement about women rather than making a fun film as the primary goal. Especially when you look into the development behind the scenes. At least, if that information is correct.