They were never gods. In the story, their world, their people are all born as gods, with powers yaddah yaddah yaddah. But the mcs, were different and weren’t born with powers like their people, which their people didnt like, so the elder gods just named them abominations and sent them into a deep slumber for their ‘sins’ so many many years passed when all the gods died ect ect. and the human race came to earth.
Now im not gonna spoil anything here, but something happens to make them become titans. Which is nor human nor god, but sort of a mix