Ji Changsheng thought to himself, I can't blame you, I thought the same at first.
"It was Empress Hou Tu who was sheltering you in the world you were in before. She put you in that world to temper your mentality and expand your experience. Now, because of her, you dare to speak boldly before Saints."
Great Mage Xuandu said, "This kind of fostering talent isn't uncommon. I also put in a lot of effort in nurturing Little Yu Linglong. I also used the whole world as a resource to cultivate her world view and mindset. But she became invincible way too soon and didn't gain as much as you did."
All one can say is that it's the creation of the Heavenly Dao, something even Great Mage Xuandu couldn't control.
Yu Linglong's talent was too good, she became invincible directly, he couldn't forcefully suppress Yu Linglong's combat power.