There was a moment in the game yesterday where Fernandes was in the box and looked like he could come inside and get a shot off, but chose to go on the outside instead and was easily snuffed out by Alexander-Arnold. I was frustrated with him as it seemed such a waste. However, Martial in the meantime was completely stationary, giving Fernandes no option off the ball and making life easy for their defenders. Funnily enough, minutes later the roles were reversed with Martial on the ball in a similar position to where Fernandes was previously. This time Fernandes was breaking his neck to run past him and give him a passing option. I think we may have won a corner due to this action. In the scheme of things two completely insignificant periods of play, however it's the small details at times that can make the difference.
It sounds like bias.
1: Martial sees that Pogba wins the ball, sees the space in behind Fabinho and drags Trent with him, makes space behind him for Fernandes
2:
Pogba attempts the ball to Martial but it ends up with Bruno instead
Martial makes the run in behind Trent and receives the ball, but his cross to rashford is blocked by Fabinho. Does exactly what you're pretending he refuses to do.
The situation you're referring to is later, and completely different
Rashford gets the ball, Martial makes a run in behind but Rashford delays the pass and plays it wide to Bruno:
Since Rashford delays the pass, Martial is already in an offside position when Bruno receives and controls the ball.
The problem is simple, there's 1 United player in the box about to be surrounded by 3 liverpool players and he has to get onside again as well, any movement towards the direction of Bruno will make Bruno's area more congested