The Desolate Ones
They realized the curse of the Creators and searched for their support to help them break it. But alas, he was no where to be found.
Years kept flashing by, and their descendents only became weaker and weaker, then their descendent's descendents also became weaker through the process.
To a point where, some of their descendants at some point in time, would not even be born as pure Gods, but impure instead. Having a bit of mortality mixed within their blood.
Then ages later, they were born as not Gods at all. Feeling threatened, they created beings of their likeliness, but learning from the creators, they made them far, far weaker.
Far weaker than their present Descendents, who weren't even pure Gods at all. They gave rulership over such weak "Gods" over their Descendents, to avoid them feeling weak and oppressed by the sheer greatness of their ancestors.