This season, Ronaldo has barely started a game for Manchester United which I think is an indication that the coach doesn't believe in his ablities. Ten Hag gave his reasons to be that Ronaldo is not fit to start which I don't see truth in, I would rather start Ronaldo and take him off in the second half of the game instead of bringing him at the end of the game.
Ten Hag didn't like a typical player like Ronaldo, we already know it before the season started. That's why Ronaldo really wants to leave Man United, but sadly he didn't find a proper club to move to. Sure, Ten Hag didn't trust Ronaldo, he prefers to choose young players as a starter in CF position in every match. It is clear that Ten Hag always chooses Rashford over Ronaldo, he may think Rashford is a better choice for the striker to optimize his strategy. I think the problem is Ten Hag thinks Ronaldo isn't fit with his strategy.