Both caused a disruption in each teams season, adding unnecessary drama and conflict. Both players also had high expectations of them, but both ended their time at the club poorly due to their interviews (yeah Lukaku’s still technically at Chelsea, but he doesn’t really feel like one anymore with him getting loaned out every season).
Cristiano Ronaldo only told truths, difficult to say, difficult to understand at that time, but today everyone understood what he intended to warn. Unfortunately for Manchester United he was absolutely right.