Scottish football gets slaughtered by people in England, but (on the park) it's raw and honest and you have to be of a certain disposition to shine up here. If you're soft, you won't survive.
Giovanni Van Bronckhorst played in Scotland, so he needs what's required. Obviously, he thinks that Scottish football is too physical for Amad. And because he hasn't got match fitness, he isn't playing in the European matches.
He is learning more at Rangers than he would be at United. He's with a club whose players are fighting for each other and playing as a team.