Regardless of the quality of the film, the only thing Ghostbusters should be worrying about is the box office, it has been about two weeks since its release and it still hasn't made back its production budget. ($144 million budget, so far they made approx $130 million)
Even then that won't cut it if they did because of their large advertising campaign, which adds a significant amount more to the budget. (Therefore they'd have to make way more than their original budget to break even.)
This is a film that is meant to kick start the Ghostbusters cinematic universe, these numbers do not sound good.