First, there are different versions of Islam.
Then, It depends on the type of Joy you are concerned with.
After that, to be faced with the truth will rarely be something joyful. Let's face it. You came to this life alone. After some time, you will leave this life alone. In the time between these two ends, you will be faced with many problems, And you will either lose those whom you love, or they will lose you. There is little to be joyful for in this life. Also Some types of joys are nothing but escaping from facing the reality.