Ten Hag was not willing to keep Ronaldo in the squad. He said that Ronaldo is old. And because of Ronaldo, Ten Hag is not able to apply his new match strategy properly. However, we have seen Ten Hag's match strategy in the last two seasons. I don't know what Ten Hag's match strategy was. Looking at the performance of Manchester United's players, I feel that the players have no goals. We have seen Manchester United's bad and irregular performance in the last 2/3 seasons.
Manchester United fans have high expectations of Amorim. Amorim is not old. So it is expected that he will be able to build a friendly relationship with the players. And identify Manchester United's problems. Hopefully, with the help of Amorim, we will see better performance from Manchester United in the future.
Honestly, he was both right and wrong at the same time. He was right that his strategy wouldn't work with Ronaldo, and that part is true because the way he makes the team play, means that he needs a bit more agile and more all around striker, not someone who can only score, a player like Ronaldo, or even let him aside, even a player like Haaland, doesn't work in his system because that player may get a lot of goals, but the team wouldn't be getting enough all together, he would not be helpful to anyone else.
What we are missing here though is the fact that if ETH had a strategy in mind, that didn't include Ronaldo, that strategy was a wrong one and he didn't get anything good at all, his return wasn't great but that doesn't mean that he was right about Ronaldo. If you have someone like him on the roster, you do not build a strategy that doesn't involve him, you build one that puts him right on the centre focus so that the team would be doing much better.