Maybe it's true that Erik Ten Hak should give Ronaldo more playing time, but honestly I still really doubt that Ronaldo can make a big impact for the club going forward, considering that Ronaldo is not in such good form at the moment.
It's natural for Erik Ten Hak to give Marcus Rashford an opportunity, because from the few games that have been played, Rashford's role and contribution has had a pretty good impact on Manchester United's results.
It's just a feeling and analysis from the fans, but basically Erik Ten Hag knows what's best for the team and now he is also carrying out his strategy this season in a more different way than last season. Hopefully Manchester United can get a trophy in the Europa League because in the Premier League it seems that it is already very difficult considering Arsenal and Manchester City are still very strong this season.
Erik Ten Hag is right in his decisions and choices. Ronaldo is old and cannot play all matches that cokes his way. He should station Ronaldo for Europa League and play Martial in the league. Ronaldo needs not to be over stressed in every match, even if he doesn't think that to himself but it's the right thing.
If Ronaldo doesn't like it, he can chose toove to any club by January.