If nothing else showing that you've tried to solve the problem yourself, before you take it further, makes it clear that you're not just a complainer. Why don't you send an email requesting a meeting with him in private?
在采取进一步措施之前,最起码你表现出愿意自己解决问题,这能证明你不是一个只会抱怨的人。你何不给他发一封邮件请求和他面谈呢?