Non-muslim friend asked me "Is Allah sadistic?"

In Qur'an 2:30, Allah says: > And [mention, O Muhammad], when your Lord said to the angels, "Indeed, I will make upon the earth a successive authority." They said, "Will You place upon it one who causes corruption therein and sheds blood, while we declare Your praise and sanctify You?" Allah said, "Indeed, I know that which you do not know." When I said this ayat to my friend, she asked me some question about God (Allah) which I have listed the questions below. 1. Allah has power over everything and knowledge about everything. If he knows everything before, why did Allah create humans who are so worst in living creature, doing injustice, rape, trafficking, etc? 2. If a girl is raped or trafficked (as a part of his test), does Allah wants her to maintain endurance [As we know it is the biggest problem for women]? Why should Allah create human and want to play with our life? Is Allah sadist? 3. Does Allah get satisfied after putting wrong-doer to hell? Instead, Allah should not have to create humans, Allah should be satisfied with Angel who are absolutely good. Please provide the answer with the citations from Quran and Hadith **EDIT:** Conversation about this topic alone went for one and half hours. But I could not answer these question. I know Allah has provided answers. Please help me.