Do not examine the faults of beings. Recognizing that they have been your mothers and thinking of their kindness, meditate on love and compassion. In particular, avoid looking for faults in those who have entered the gateway of the Dharma. Regard them as people in the same boat and reflect only on their good qualities, rejoicing at these and cultivating devotion. More especially, never look for defects in your teachers. Realizing that everything they do is full of excellent qualities, make an effort to train in devotion and pure vision.

A greater fault than stealing the possessions of all the beings in a billion worlds and destroying all the stupas there are is criticizing a single Bodhisattva. If one scorns and insults a Bodhisattva, whatever the circumstances, one will be reborn in the Screaming Hell with a body five hundred leagues in size, with five hundred heads, each with five hundred mouths, each containing five hundred tongues, and each tongue plowed by five hundred plows.

Take note of this passage from the Sublime Sutra of the Marks That Inspire the Development of Faith

In general, it is a boundless crime to criticize a sublime being.  In this respect, Bodhisattvas are particularly dangerous objects, and Secret Mantra Vehicle practitioners even more so. We cannot know who is a sublime being or whether someone is inwardly a genuine practitioner. It is said that only a fully enlightened Buddha can judge; no one else can do so. If we speak badly of anyone or criticize them, we are sweeping away our own qualities. It is in the nature of things that by finding faults in others, we ourselves are destroyed. Change your attitude, therefore, and examine only your own faults.

“For beginners, it is not the time to struggle with afflictive emotions, but time to run away from them.”

as said by the incomparable Dagpo Rinpoche

A Torch Lighting the way to Freedom
Dudjom Rinpoche Jugdral Yeshe Dorje
Padmakara Translation Group