He is the main part of dysfunctional midfield. He doesn't run nor tracks back. Fair **** to him for scoring some important goals, when no one else can.
Biggest issue ten Hag made is making Rashford a focal point of attack. He's not that good, nor he'll ever be. He's a good player but not the one United should be building their team around. Also moving focus to the other players, who are better ( and lets be honest, only Bruno really is, so United should yet again but a 100m player since Antony is a complementary player, not a player you put your fortune on) would bring the most out of Rashford.