Why is Richard III still not satisfied when crowned king?

Richard III remains unsatisfied despite being crowned king because he is deeply insecure about his legitimacy and the unstable nature of his rule. His ascent to the throne was marked by treachery and bloodshed, leaving him paranoid about threats to his power, particularly from those with a legitimate claim to the crown. Additionally, his ruthless actions alienate potential allies, leaving him isolated and perpetually anxious about rebellion. Ultimately, his crown does not bring him the peace or acceptance he desperately seeks.