This is one of those "comedies" that you are not expected to laugh. Maybe you can muster a smile when Melissa McCarthy's does some of her patented physical humor, but that's it. Add to that a ridiculous plot, and you have two hours that you could've spent doing something better, like sleeping, perhaps.
On a related point, what happened to the career of Melissa McCarthy? If these are the roles she is accepting I'm sorry because I really thought she was talented, but I guess the mortgage won't pay itself.
Finally, I have to wonder, why are these kind of movies ever made? Not funny, not amusing in any way, just a half hearted attempt that seems some executive or investor should've said, "This script is garbage, come back when you have something good!"