Why was Cronus bad?

Could you elaborate on why Cronus, often portrayed as a deity in ancient Greek mythology, is considered to be "bad"? Was it due to his actions as the leader of the Titans, particularly his devouring of his own children? Or was it because of his association with the concept of time, which can be seen as both a blessing and a curse? Understanding the context and motivations behind Cronus's character may provide insight into why he is often portrayed in a negative light.