I understand your feeling... Cuz I recently put all my crystals to pulls and got no 5★ Child while I was playing my personal account... Yes, It's definitely frustrating.. for sure.
You will surely need some time without the game around.
And we are sorry that we couldn't provide pleasant experience..
But I hope you come back someday when you suddenly remembered DC sometime in the future.
We will do our best to make DC a better game.
So come back anytime you want.
We will be waiting for you my friend.