I'm saying nobody is dropping them back then as they were the level of young player that Haaland or Joao Felix is now.
He stalled Rashford's career because he preferred Lukaku's trampoline touch, and Balotelli was seen as a superstar-in-waiting at 18, who he then dropped from the first XI in his 2nd great season at Inter, which was the zenith of Mourinho's career.
Mourinho is not developing a 2015 Son Heung-Min or Dele Alli, one of many reasons he shouldn't be in hi job.
You are just making stuff up as you go. You have now changed your argument from age ro level of development.
Both Di Maria and Ozil were younger players than the current Bergwijn. Neither of them was at the level of Haaland or Joao felix. Neither of them was at a big club until they joined Madrid. Ozil in particular was bought as a backup option to Kaka but in your warped mind they were undroppable.
He stalled Rashford's career cos he bought Lukaku? Was that career stalled when Rashford made 35 Pl appearances? or was it in the previous year when they had Ibra and Rashford made 32 appearances?The reality is that Mourinho simply preferred to play Rashford as a LWF where his pace was more effective and preferred his target CFs in the middle. Interestingly, that is the same LWF role Rashford has spent most of his time under Ole. Guess Ole is also stalling Rashford's career by signing Cavani?
The best everyone has seen of Balotelli was under Mourinho at Inter. Balotelli dropped in the pecking order cos they were better player like eto ahead of him. Even than he made 13starts. Since then no one else has gotten anything even close out of him, and usually by no fault of the managers. When he should be at his peak,Balotelli was playing for Nice in Ligue 1 but that must be Mourinho's fault as well.
Whether he can develop a younger Son or Dele is not the debate, but your stupid false claim that Bergwijn is likely 'suffering' under Mourinho cos of his age. Did it ever occur to you that Bergwijn;s confidence might have been severly damaged by the spotlight his misses against Liverpool brought? Can it be that Bergwijn is out of form while Moura is in form? Could it be that the young boy is still adapting to the league and environment? Is it possibly that he is struggling with all the changes brought about by the pandemic? Is it possible that he has issues in his personal life that is not public knowledge?
But then such things never crosses the mind of people like you, and even if it did you would quickly wave it aside, in favor of the higher truth - Mourinho is the root of all eveil and must be blamed for everything that is wrong in the world.
At the rate you are going, you will soon be blaming Mourinho for the pandemic and Trump's election loss.