Good, finally you are admitting he deserves some praise for keeping him in the team.
We see managers making bizarre dicisions all the time, players who deserve to play don't always play under a lot of managers, some play a false 9, some start 6 defenders, LvG plays Young or Di Maria as strikers, so even though there were injuries he still chose Rashford. Then he kept playing him. He then took him off at halftime against Tottenham. However 3 days later at West Ham away he still started him while Mata, Young and Memphis and Rooney (albeit the latter came back from injury) started on the bench.
Yes young players still need to perform, but for this they need chances first and not every talented youth player gets enough chances from every manager.
LvG did a lot of mistakes, but he deserves top marks for Rashford.