Even if the skill gap for SG is indeed not huge, she can still be beaten. We have seen Supergirl being defeated in the past. For example, Theo played Scar at the IJ2 Pro Series Finale, and Theo and Superman beat Scar and Supergirl 3-2, and both of those guys are excellent players. Also regarding the MU's, even if SG has absolutely no bad MU's (which is unlikely considering that there is still no MU chart for her to confirm such a thing, at least not that I've seen one, so let's just hypothetically say it is true), are all of the MU's 7-3 in Supergirl's favor? Because like I said, if the MU is 6-4, it can still go either way, it's just that the opponent who faces Supergirl has to be more careful.