Gampopa, also known as Dakpo Lharje, was a highly influential Tibetan Buddhist master who lived from 1079-1153 CE. He is considered one of the main founders of the Kagyu school of Tibetan Buddhism and his teachings have had a lasting impact on the development of Tibetan Buddhism. However, like many historical figures, Gampopa's life and teachings have been surrounded by controversies.

One of the main controversies surrounding Gampopa's life is his relationship with his teacher, Milarepa. According to some accounts, Gampopa was initially a student of the Nyingma tradition, but later became a disciple of Milarepa, who was a Kagyu master. Some critics argue that Gampopa's switch in traditions was opportunistic and that he betrayed his original teacher. Others argue that Gampopa's decision was based on his spiritual journey and seeking the most beneficial teachings for his own enlightenment.

Another controversy surrounding Gampopa's life is his alleged involvement in the assassination of a rival teacher, Rechungpa. According to some sources, Gampopa was involved in a plot to kill Rechungpa, who was a disciple of Milarepa's brother. This incident has been debated among scholars, with some arguing that the evidence is not strong enough to support Gampopa's involvement. However, this controversy has tarnished Gampopa's reputation and raised questions about his moral character.

In addition, there have been debates about the authenticity of some of Gampopa's teachings. Some critics argue that some of his teachings were not actually written by him, but rather by his followers who wanted to attribute their own ideas to him for credibility. This has led to questions about the accuracy and reliability of Gampopa's teachings.

Furthermore, there have been controversies surrounding the lineage of Gampopa's teachings. Some argue that Gampopa's teachings were not passed down in an unbroken lineage, as claimed by the Kagyu tradition. This has raised doubts about the authenticity and purity of Gampopa's teachings and their connection to the original teachings of the Buddha.

Lastly, there have been criticisms about Gampopa's emphasis on monasticism and renunciation. Some argue that his teachings promote a narrow and ascetic view of Buddhism, neglecting the importance of lay practitioners and their spiritual path. This has led to debates about the relevance and applicability of Gampopa's teachings in modern times.

In conclusion, while Gampopa is highly revered in the Tibetan Buddhist tradition, his life and teachings have been surrounded by controversies. These controversies have raised questions about his character, the authenticity of his teachings, and their relevance in modern times. However, regardless of these controversies, Gampopa's teachings continue to have a profound impact on the development of Tibetan Buddhism and his legacy remains an important part of the tradition.