Carol is a very good example of how anger, greed, and jealousy can bring us down more and more. Buddhism is a practice of mind, to examine what is in our mind, acknowledge it and abandon the negative habituation or work hard to get rid of the habituation. Buddha Shakyamuni has proven to us that Dharma can get rid of suffering, there is no doubt. If we don't feel that, it means we have not applied Dharma in our lives!
Carol has the good merits to meet her teacher Geshe Kelsang Gyatso, who is a great master. However, Carol didn't have enough merits to continue to support her to see the good qualities of the teacher and continue to progress in her spiritual journey. Everything started with a small wrong view on the teacher and things just start to get worse.
Carol's wrong view on the teacher has blinded her to see the truth. Even though she is still in the Buddhist scene but what she is doing is the total opposite of what Buddhism is. She disparages her teacher who is a Buddha. She is creating the cause to be further away from Dharma. In the 50 Stanzas of Guru Devotion, it is said that if we disparage the Buddha, we will go to hell. It looks like Carol will end up in hell.