What was ironic about the manner in which Oliver Cromwell presided over the English Commonwealth?

Oliver Cromwell's leadership of the English Commonwealth was ironic because he initially championed the ideals of republicanism and opposition to monarchy, yet he ultimately ruled with authoritarian tendencies. Despite advocating for greater parliamentary power and civil liberties, he dissolved the Rump Parliament and established himself as Lord Protector, effectively consolidating power. This contradiction highlighted the tension between revolutionary ideals and the realities of governance, as Cromwell's regime mirrored the very tyranny he sought to overthrow.