Shen Zhui didn't dislike the headmaster of the Liushan Pavilion from the Great Xia Academy, in fact, he had a rather good impression of him.
In terms of both strength and charisma, Chen Qingshan was indeed a bona fide scion of a prominent family, a genius in his own right.
As for Chen Qingshan's view of Shen Zhui, he held nothing but admiration. In their initial challenge, Shen Zhui was at the peak of the Spirit Bridge Realm and managed to defeat him with equal strength. This was a testament to his true capabilities. Shen Zhui's subsequent performance in the Ciyun World journey left him even more impressed.
As Lu Yuanwei said, not everyone you beat becomes an enemy, some even become friends. Such was the case with Shen Zhui and Chen Qingshan.