At one point in my life, I was experiencing great difficulties. I went to a good friend for comfort and advice. I told her I didn't understand why certain things were happening to me but I was sure that certain people were “causing” my difficulties. I had no “direct” proof because people who do jive stuff to other people often do their dirty deeds “indirectly”. They don't want to get their hands dirty so they manipulate others. I must have said that I didn't understand WHY too many times. Finally, my friend heaved a huge sigh and said very calmly: “Some people are just evil.” That's WHY.
Funny but that short statement helped me gain clarity and then after I had calmed down, I worked on a solution to alleviate my problems.