But I was told to come here in order to get help from developers
you will not find here any help from the developers, just some opinions or advices from other players of the game.
This is also a great help.
Well, from my experience so far, this difference is not enough to give you a sure victory.
Also very important (as much as quality) it's the formation and orders of the teams.
I believe that the game is 40% quality - 40% formation/tactics - 20% other stuff.
Among other stuff is luck or the opposite - bad luck or else troll result, a common expression in this forum.
A common troll result is when your opponent doesn't watching the game, have an injury and auto-subs are off.
So it's not just bad luck. It's a kind of a bug in the game and you gonna see it some more times in the future.