Why was Claudius evil?

Claudius is often regarded as evil due to his manipulative and ambitious nature, particularly in Shakespeare's "Hamlet." He murders his brother, King Hamlet, to seize the throne and then marries Gertrude, further entrenching his power. His actions are driven by a ruthless desire for control, showcasing his moral corruption. Additionally, his willingness to betray and manipulate others, including Hamlet, underscores his villainous character.