Greetings. I ask you not to be disrespectful to the Gods as they are the most benevolent and the wisest beings that are currently trying to help us. There's a reason why we call Zeus ''Father'' - they are literally our parents and they love us, otherwise they would have abandoned us.
Now, they are not here simply because they have a higher threat to take care of - the same enemy but of greater proportions, since its cohorts that rest on our planet or nearby are not the sole army this enemy has. We are not the only ones going through a war here on Earth. The enemy has plagued many planets, and the Gods don't invest their efforts in only us.
Most probably, they knew of the yehuborim and Corrupted Beings far before we were created. But why would that stop them for creating a species, if it would be self-sufficient? They gave us wisdom back then, taught us how to act, taught us occult sciences, meditation, taught us how to elevate itself to the point human beings became Gods. They tried to make to turn us into the best we could be - but it happened that the enemy came before we were prepared enough to defend ourselves, and The Gods had to leave to defend the rest of the borders.
They're not sadistic maniacs that like to see us suffer. They had to go and we weren't good enough, not self-sufficient enough, and thus we fell prey to the enemy.
Even now, they care for us, otherwise the ToZ and all its efforts in the world wouldn't exist .
Moreover, they created us to be independent and powerful. They have their own part in the war to solve there in space, and they have their own lives and business, and thus, can't live for us, in the literal sense. They have a lot of responsibility and we must learn to save ourselves and to fulfill ours. Moreover, the enemy on the planet wouldn't just allow them to land their spacecraft without a fight that could blow out the whole planet happening. That is why we must advance without their physical presence at the moment.