With all due respect to both yourself and Accyrover, that's not a fact, but anecdotal evidence at best.
I actually asked around today whether results were pre-determined. I assumed they weren't, but asked anyway on the off-chance that I was wrong. What happened two weeks ago when all the matches were "simulated" is a feature that exists, primarily for testing purposes, but it's not something that should happen on the Live servers. It sadly did, but the matches were still calculated then, taking all available variables into account. When matches are actually played Live, it takes into account you watching it, substitutions, additional supporters and other factors.
Results aren't pre-determined.
I know conspiracy theories are fun, and I've read a good deal of them here so far (as well as on other game forums I've taken part in as a member), but in the end, it's my word against whoever claims otherwise. If you don't want to believe an official answer on a subject, then there's nothing I can really say, is there?