Who is to blame for billy bibbit's death in one flew over the cuckoo's nest?

Billy Bibbit's death in "One Flew Over the Cuckoo's Nest" can be attributed to a combination of factors, primarily the oppressive environment created by Nurse Ratched and the psychological manipulation she employs. Her ruthless control over the patients exacerbates Billy's insecurities and fear of failure, particularly regarding his relationship with his mother. Additionally, Randle McMurphy's influence and eventual fate contribute to Billy's tragic decision, as he feels abandoned and overwhelmed after McMurphy's lobotomy. Ultimately, the systemic failures of the mental health institution and the toxic dynamics at play lead to Billy's tragic end.