Aging is unavoidable Ronaldo will definitely face that problem but with big enough ambition to make him believe that he still deserves to play in the highest caste, but that's what we see that Ronaldo doesn't show his professional player so this has led to a lot of speculation that has become crowded, because he wanted to leave or Ten Hag didn't give him a chance, Ronaldo wasn't played from the start, so it all looks again at the age factor because the coaches don't want to play old players.
There are rumors about that where Manchester United gave Ronaldo a chance out in the winter (don't know what happened in the talks with Ten Hag) on the other hand it is always linked with Chelsea being the club he is interested in, but Graham Potter never talks about that he still focus on existing players while rumors about Ronaldo like Potter did not respond to him.
I'm sure Ronaldo wanted to try other clubs in August but on several occasions Ten Hag stated in the press that he wanted Ronaldo to stay at the club as he was part of his plans for the season but the case seems to be different because Ronaldo sitting on the bench for every game doesn't show that he is part of any plan this season and that has triggered him to act the way he did.
He is not even feeling confidence anymore in united. He was loosing lots of time in the bench. Ronaldo has a very hard time during his time in manchester united. He was only seeing his team play even when his team lose and he will never play again for united. It's time to him to step ahead.
He will always be in the conflict when he was still stay in united. In my opinion if he must have moved from MU. that's a must rather than creating more conflict that will prevent new club to buy him