United is a 60 point team who is going to luckbox their way into 70 points. Arsenal are a 90 point team. Do the math.
Gotta admit, I find this business about how Arsenal plays home to this fixture where City is away to that other club kinda silly. That sort of thing could end up being important in the title race but even so it's still irrelevant to United. Like starting this weekend. Right now, United is 8 points back of Arsenal on points dropped, and United plays Leicester tomorrow whereas Arsenal play them next weekend. Arsenal for sure will beat them, but United is kinda maybe a little better. United could win, but then you can't be really too upset if they drop points, for just an overall lack of quality in the squad. Whatever it is, the most likely thing is that by this time next weekend United will be further behind Arsenal than they are now.
For what it's worth, I'm a pretty atypical fan. The Arsenal subreddit had this on a few days ago,
reddit.com/r/Gunners/comments/111653f/this_is_so_accurate,
which is more representative of the fan base I figure.