The problem with your supposition is that you first create a supernatural world (that which we can not observe) and then label those who do not believe in it.
The fact that you first have to construct a supernatural world, then place beings in it, is what atheists disagree with you on. They do not disagree on your supernatural beings, they disagree with your supernatural world.
If something can be observed there is no reason for belief. If something can not be observed in any way, other than some human being is convinced that something is so, there is no reason for belief. And the only reason someone is labeled an atheist is because the human being who is convinced in the supernatural world wants to put a label on those who do not.
This supernatural world can contain titans, gods, fairies, leprechauns, vampires, magic, etc. Currently, only the people who believe in a supernatural world filled with gods seem to feel a need to label the non-believers. And since this is apparently so important to them, I let them.
If you feel you can not cope with the natural world, and a supernatural one on top of it helps you, you are free to do so. It is when you start asking me to believe in the same supernatural world that you do, that I draw the line. Especially when the asking is done at the point of a sword.