It is not from the manhaj of the Salaf to publicise the faults of the rulers and to mention such things from the pulpit because that leads to confusion, disorder and the absence of hearing and obeying the ruler in what is good.

It also results in (the people) becoming engrossed (with these matters, arguing and debating) which causes harm and produces no benefit. The followed path with the Salaf, however is to give advice with respect to the matters which are between themselves and the leader, writing to him or by reaching him through the scholars who keep in touch with him (to advise him) until the ruler is directed towards good.

Repelling evil occurs without mentioning the doer of the evil. So fornication, drinking of intoxicants and taking usury are curbed without mentioning the one who does such things. Warding off evil and warning people against it is sufficient without it being mentioned that such and such a person does it, whether he is a ruler or other than the ruler.

And when the fitnah occurred in the time of ʿUthmān, some of the people said to Usāmah ibn Zayd , "Will you not speak to ʿUthmān?" So he replied, "You think that I will not talk to him without letting you know about it (also). Indeed, I will certainly talk to him regarding that which concerns me and him without initiating a matter which I do not love to be the first to initiate."

And when they (the Khawārij Sabʾiyyah) opened up evil in the time of ʿUthmān and showed rejection against ʿUthmān openly, the tribulation, killing and mischief which has not ceased to affect the people to this day was brought about. And this caused the tribulation to occur between ʿAlī and Muʿāwiyyah and ʿUthmān was killed for these reasons. (Furthermore) a large number of Companions and others besides them were killed due to this open rebellion and the open proclamation of the faults (of the ruler), until the people began to hate the one charged with authority over them and killed him. We ask Allāh for success.