Our manager is always complaining us about using private phones during working hours. However, whenever our General Director is out of the office. This manager keeps using his phone or doing private things the whole day. Supposed that, if he criticize us next time, can we say
You're not capable of criticizing us because you are also using your phone all day long.
I'm not sure if it is correct and natural or not. Could you help me?
About the context, actually I just made it up to speak my mind easily. I might not dare to say that to my manager :)). I will use your suggestions in another similar context with another person.