Before now Ten Hag uses 4-3-2-1 which was when Anthony Elanga and Bruno were fit and always have Rashford play top 9. But with Bruno and Elanga's absence he substituted to using 4-3-3 with Ronaldo has center forward. Ronaldo's performance where he played against Aston Villa wasn't faulty i think most keepers has taken their time to study his games the reason why D. Martinez was able to predict the direction of his attempts. Playing him as substitute is best for United
Erik Ten Hag rotated players, following Bruno Fernandez and Antony could not play due to injury, but the problem was that the rotation did not go according to the desired scheme, losing Bruno Fernandez really made Manchester United's midfield not develop, so there was no feedback. which can be given to the Striker. Donny Van De Beek was too lazy to pick up the ball and didn't play at his best.
Well even though Haaland is the top scorer on Manchester City, it doesn't mean the other players was play bad. Don't forget they have Kevin De Bruyne which currently the best central midfielder player in this season, Phil Foden and Riyad Mahrez who have a good speed and accurate pass to support the center forward. As you can see in the last 2 matches of Manchester City, they let Alvarez to play, not Haaland and they won the 2 matches.
We think the Manchester City players have the same level of quality, they are capable of playing a role that fits the position Pep Guardiola has given him, Kevin De Bruyne is a general on the pitch who always shows his best class. Although Julian Alvarez is not as good as Erling Haaland in terms of goalscoring, he has also made a big contribution and from the previous two games so far he has scored two goals.