The God of Void was completely rude as he talked about the Ancient God of End. Just for the fact that this old man caused a misunderstanding between him and his Jing'er, he also tried to harm his wife a couple of times. Because of these reasons, he couldn't hold back his hatred for the Ancient God of End.
The God of Destruction actually didn't care much about this ancient god. Even though they say that he, as an incarnation of the Ancient God of Chaos, happens to have a familial relationship with the two ancient gods, Hei Anjing just doesn't feel like liking them. Maybe in reality the real Ancient God of Chaos no longer has feelings for the parents that gave birth to him.