Many people choose to suffer not because they have no food or drink, clothing or shelter BUT simply because they cannot have what THEY want, when they want it and how they would like it.
The only time we will get what WE want, when we want it and how we would like it is in Paradise. Never has the Almighty promised us that we would get everything we liked or wished for in this world. If that was the case there would be no purpose to create Paradise as it would have no specialty.
People become depressed, at times from an early because they have not understood the plan of the Almighty. May He make us content with the share He has chosen for us in this world and grant us whatever we wish for in this world and in the hereafter!