With Sancho, I personally think there is a variety of issues.
As I said before, came to Utd at the wrong time.
An English player who was a star boy abroad coming back to the PL, the expectation and pressure is high.
Price tag = more pressure.
Ronaldo had a negative affect, Ronaldo did great first season but all the other forwards struggled. Ole who fought for Sancho to come, got him and Ronnie same summer and he now couldn’t play Sancho…never had the chance to hit the ground running.
Not making the England squad, probably affected his mental health, led to lack of motivation, led to lack of fitness.
Finally, until ETH came in, Utd been killing careers, it’s only Bruno that really thrived since coming. Ultimate responsibility falls back on the Glazers/Woodward.
However, I believe if anyone can get him back it’s ETH. Sancho suits his style of play so much.