Yeah, I know it is legal, but I just wonder why the developers put that formation in the algorithm as an almost perfect formation.
If he always wins (against teams with several different formations), it means that the game considers this formation better than most of the rest.
If I'm right, it means it's a HUGE mistake of the developers, because I have NEVER seen that in real life.
Have you seen any team with that formation in real life?? If yes, please name that team.

If they didn't do that on purpose, then it must be a (again) HUGE bug.
I can't find other explanations.

(again, it can't be luck. You can be lucky for a few games, but not for the entire season.)