What is the contradiction between Zhong Hui and Wargo?

Say that Wargo did a good job, Zhong will say that he rebelled and was killed. Zhong Hui is trying to resist and be suppressed. Zhong Hui (225 -264) was born in Yingchuan County (now Changge County, Henan Province). In the late Three Kingdoms period, Cao Wei was an important counselor and calligrapher, the youngest son of teacher Zhong You and the younger brother of Qingzhou secretariat Yu Zhong.