This is obvoius wrong calculation in FM. Despite of your tactics ( who backpackant describes like rubbish ), we can't deny the fact that ManUtd got 22 shots on target. I consider Shots On Target BIG chances of goalscoring ).
The former norwegian coach of the Norwegian National Team, who is an statistical guru, Egil Olsen, said that normally you score in about 20% of your BIG chances of goalscoring - this is a statistical fact. Then ManUtd should have scored 4,4 goals and Inter 0,2 goals. As you can se the normal result should have been 4-0.
I can understand why Dextorious react.
The best to do, to avoid conflict with our logical sense, is that the AI don't give away so many Shots On Target chances to the usercontrolled player, such as it feels more real to the natures law.
If not, in my opinion, the result should more often reflect this statistical rule.