Life isn't hard because He made it hard. Life is hard because we have made it hard by our actions. The consequences of sin has made life what it is today. Otherwise, we would be able to actually see God, talk to God, eat with God, face to face right now. That day is coming again, but only to the people that believe in Jesus and the Salvation that He gives.
God doesn't make anybody kill another person. God doesn't give anybody a sickness. God doesn't cause your Dad or Mom to die before you're a teenager. God doesn't cause terrible accidents. The consequences of sin cause this. This is exactly what Satan wants. This doesn't mean because you sin bad things will always happen to you, this means because we all sin, the earth isn't the way it is suppose to be. It was perfect when God first created it. Nothing bad every happened, until the day Adam & Eve, our ancestors, gave into temptation.