A lot of half truths are being said here. A young Martial would probably do better with prime SAF because prime SAF would not allow players like Martial to lazy around. If he did, then he would be on the way out. United's over sentimentality is what is ruining this club. There's always seem to be an excuse whether its injury/illness, mental problems, off the pitch issues, players who have issues at home, players who have issues with the manager, the training regime. Well guess what? Those same players expect United to still pay them silly salaries despite them not delivering the goods.
Its time United start acting like a top club. Yes we pay huge salaries, yes players should expect the best facilities, the best football people etc (something United must provide) but the club should also expect the best players and professionalism at all times. Players on 200k-300k a week should be delivering the goods at every single game. That mean run like crazy, having regular 7/10 performances and act professional at all times. Ask yourself whether the likes of Martial, Rashford, Sancho and co would survive at Real with that attitude or how their fans and board would act at Casemiro jogging at the Bernabeu as he's doing at OT. I'll tell you, they would rip them into shreds.