Let's discuss the game !!

[Tactician]

Maybe using the right tactics and high quality makes it 99% to win a game but 1% can still occur
But is luck a main factor in the game so user doesn't have to tire himselself choosing the best tactic ??

And what does possession do in this game
Does it really help anyone to win??
Sometimes I lose despite having 70% possession!

In my opinion, there are deliberate things programmed to happened in this game. In addition to those, maybe there is a roll of dice involved for some decisions like the form of your players, and so on. So, 'luck' is generally insignificant as compared to quality, tactics and those deliberate hidden programmed things. If this game was based mostly on luck, then results would follow some sort of probability distribution, but it does not appear to be so.