Basically the title.
I believe there is a heaven, or a hell, depending to how you look at it.
The world is a heaven or a hell, or a limbo even. No matter where God(if applicable) sent you, you will always feel the same.
To those grateful for everything for a strong belief(for example, in a Godly figure in any religion), placing them in the world will feel like a heaven to them.
To those complaining everything and blame their neighbors for their faults, they will blame and be angry elsewhere too unless they change. The world feels like hell to them.
And to those who has nothing to do but to waste time with useless things, the world will feel useless, gray, and uneventful, kind of like Limbo.
The world is a heaven to the people who treat it like one. The world is a hell to the people who treat it like one. The world is a limbo to the people who treat it as one.