What is really unrealistic in this game is the players ratings.
Most of his players especially oppos defenders underperformed.

My attackers on the other hand had good ratings. The 2 players under 7 rating were subbed and the subs had 7+ rating as well.

So I can't see how this could be realistic, why I could not score.
Also when Oppo changed formation into 5-1-4 with no am and no st I expected to win, a kind of penalty for this no attacking formation. He played this way for 40min.