A megolamaniac is a person who has an obsessive desire for power, so if someone's demands become gradually like a megolamaniac's, it would imply that the person is becoming increasingly unreasonable
Consider the statement "It seems like he's just really uncharismatic, until his demands become gradually more reasonable.". Based on this "It seems like he's just really charismatic, until his demands become gradually like a megolamaniac's." a true statement? Yes, no, or I don't know?