How to stop hating your mother in law?

There is two points to consider. One is whether she is a good person but fails to show that to you or others. In This case, you should keep on showing your best behavior and personality to her. One day she will find ways to show her love. The second point is if she is disappointed in some thing. If the thing she is disappointed is strictly yours then you should consider what you can do. But if that thing is something you have no control over, thereis nothing left to do unfortunately. The main thing is to bring love when there is hate. When we can replace the bad perspectives with good ones. We can make it better.