First of all Maguire is a horrible player and should not be played, there isn't a situation where he is the best defender they have, he could be removed and they would have a great team, Varane and that other defender I forgot his name the short one, those two would be good enough, if you put them and then Ronaldo it should work. They have casemiro to play at midfield as well, so that team should be fine enough.
Thankfully Erik ten Hag doesn't prefer Maguire in the starting eleven of important games anymore. He started to choose him in only Europa League games lately. He isn't a reliable defender for any big team at the moment. I think that he might be sold after the end of the season also if they find a better replacement for him. He shouldn't be even the last resort for Manchester United I mean.

If Ronaldo also leaves the team at the end of the season then Manchester United should go for a good striker transfer. They can't continue with only Rashford. Antony has been brought here but he isn't a striker. Some people think that he is here to replace Ronaldo so that's why I wanted to say that. However Ronaldo might decide to stay if Manchester United make it to the Champions League this time.
Manchester united fans would be delighted to see Erik Ten Hag finally solving the problem of having Harry Maguire starting every game for Manchester United knowing fully well how bad his performances have been since last season. A number of times the fans have called for the benching of Harry Maguire but their plea have not been attended it will please the fans to finally get their plee attended to. The teams is playing well now since Maguire started sitting on the bench. I don't think Ronaldo will be staying after this season in Manchester United, it is time United start searching for a suitable replacement.