He shouldn't have returned in the first place, but that was done all because Sir Alex Ferguson called him directly. Yeah, Ronaldo gave Manchester United winners against Tottenham Hotspur and Fulham United scoring Hat tricks against these clubs.
That was a huge mistake for me. There was nothing to be achieved at Manchester United, the club was already shaky at that point as they were yet to recover from the departure of Alex Ferguson. A reasonable deal for Ronaldo would have been to sign for Manchester City. I bet he would still be playing in the EPL if he had moved to City. Pep is not a manager that is afraid of the greatness of a player, and would have built the team around Ronaldo just as he has done with Haaland.
I think Ronaldo himself felt the pains as a result of the mistakes he made by returning to his former club Manchester United, whatever love he had for the club and whoever advised him to accept to comeback to United did not do well because the guy almost ended his football career with his return to the club. The offer was made for him at Manchester City which would have been more profitable and easier for him because the City team was balanced with lots of good players whom are willing to give him the right passes while he scores the goals because he was no longer the fast player that he was but still his goal scoring abilities were not affected because returning to United he was the highest goal scorer of the team. City coach Pep would have made good use of Ronaldo because he's job would have been to get the goals that will help the team to win matches and trophies but Ronaldo must have listened to his former manager Sir Alex Ferguson before accepting to return to United.