I think United were fortunate enough to punish Everton for their clumsy challenges because in open play the failed to find the back of the net not until those penalties which Garnacho won fair and square with no controversy!! And with Liverpool coming next, United neede
That's it.
Man United got big luck in this match. Cz, all of the goals were from penalty kicks. Well, actually if we are looking at how they are playing, Everton was not really bad. Moreover, Everton was able to make many attacks. But, I don't know why, both Everton and Man United were bad enough in executing the shots. Although they have many shots on target, none of them got to be goals.
But, whatever it is, victory is still victory. in this situation, Man United got advantages of this result by getting 3 point.
Just watched Arsenal play against a determined Brentford that wanted to spoil their title chase, but determination and continued pressure allowed the boys to find it late to take maximum 3 points which keeps their title chase alive and switch pressure to Liverpool and Manchester City who face each other , great job Arsenal 
Arsenal is exactly on fire right now. They thought that whatever the matter, they must win this match in order to take this great chance for them. As we know, there will be a big match between Liverpool vs Man City, so, this will really benefit Arsenal. At least, they may take another good step to take over one of the upper position.