As far as I know, the most hated thing is higher mathematics of the Chinese college students. I am so happy I don't need to learning higher mathematics.

就我所知，中国大学生最讨厌的东西就是高等数学了，我非常开心不用去学高数。

youdao

I was quoted in a recent article as "I hated teaching because the students weren't prepared for learning."

在当时的一篇文章中，有人引用我的话,“我讨厌教学，因为学生们总是不做好,预习工作“

普林斯顿公开课 - 人性课程节选