This is wrong. While you can change the probability that your team will get a better result, there is always an element of randomness to the game. They've even come out and said that they employ Random Number Generators (RNGs) so it's not like I'm making this up.
Okay, but you're sure that how many percent of random in this game? I think it so so little.
One season i usually lost some 3-4 matchs but by other reason, not random