Yep, it's comical. It's like everyone vehemently agreeing the Emperor has clothes out of fear.
In the end, I don't want to ascribe someone's motivations though. I'm happy with believing even the feminist whakos genuinely enjoyed the film--I really just want that same courtesy in return, for all people. If someone gives a bunch of reasons outside the fact that the movie has an all women cast, that they don't like the film--then it's ridiculous to subvert that to sexism. And it's exhausting. There was a great post on /r ghosbusters today responding to what I imagine was a legit Sony shill asking why fans were having such a bad reaction.
The post pointed to the difference between Stark Trek Beyond's trailer and the subsequent dialogue between the production staff and fans, vs Ghostbusters. In the Stark Trek incident, the writer (Pegg) came out and said he agreed the trailer was...bad, but he told the fans he though the film would be good and the trailer was bad marketing, please hang on and give it a chance. The fans, despite being angry, all liked the response and the community instantly settled down.
Meanwhile, the ghostbuster reaction was to essentially call everyone sexist, and terrible people and say their entire hobby/culture (Geek culture) was awful (While also denying women's existence who opposed them, lol.)...I'm not sure who thought that was a good idea to connect to the fan base.
It's good to show contempt for your fans, it helps!