Why did Charles 11 hate oliver cromwell?

Charles II harbored animosity towards Oliver Cromwell primarily because Cromwell led the parliamentary forces in the English Civil War, which resulted in the execution of Charles I, Charles II's father, in 1649. Cromwell's establishment of a republican government and his role as Lord Protector further solidified this rift, as Charles II viewed Cromwell as a usurper who had disrupted the monarchy and traditional governance. Additionally, the conflict between royalists and parliamentarians created enduring animosities that shaped their legacies.