If he expresses personal grievances, you can express public grievances. Few officials are clean now. Find evidence of his corruption or taking advantage of the public, and let him get more than one bargained for.

Copy a satirical poem written by Wen Yingjiang in the late Qing Dynasty for you:

stylus

Wenqing Yingjiang

A thousand hammers and a needle,

Inverted, inverted,

Eyes on the ass,

Only clothes, no one.