Did Manchester United make a MISTAKE selling Sancho, De Gea & McTominay?

Manchester United have really struggled with their recent incomings to the club. However, it looks like the out goings of players have benefitted highly by getting away from the club.
Jadon Sancho, Scott McTomainy and David De Gea all look much better at their new clubs instead of Manchester United.
Why is this?
#manchesterunited #premierleague #mufc #football #manutd #liverpool #manunited #lfc #europaleague #sancho #degea #mctominay

[@Keiron-pw6sl]

Mctominay yes say what you want about him he tried his heart out and could score you a goal can we say that about our current midfield