Being a Christian does not protect you from suffering. Even Christ's apostles were not spared from violent martyrdom. The character of God is such that he gave his only son, whom he loved, to die and pay for our sin. Sin is a cancer that afflicts us all. Don't think your experience is evidence that God is evil or callous. Just means there are people around you who have much to answer for..... who especially need Jesus for their sin is great.