If we believe god's aim is happiness on earth, we will be disappointed, because his aim is to rescue us from here and raise us to unity with him in spirit. If his aim was happiness on earth his son would not have been crucified and he would have stayed as a physical king forever.
People do not understand this and attribute worldly good things to him, then neglect to do the same with bad things. Very troubling.
He did not even save his own son's earthly life, because his focus is on spirit - because he is a spirit.