Why did loki turn to evil?

Loki turned to evil primarily due to his complex upbringing and feelings of betrayal. As the adopted son of Odin, he struggled with his identity and jealousy towards Thor, the favored son. His desire for power and recognition, combined with manipulation from external forces like Thanos and his own insecurities, drove him to embrace villainy. Ultimately, Loki's actions stemmed from a deep-seated need to prove himself and find his place in a world where he felt like an outsider.