There are definitely instances where the 'game' makes decisions for you or makes an easy task seem impossible, like tackling the ball. I've had games where my opponent will run the ball right through my back line with all my players actually running away from the ball and I have no defenders close enough to switch to.
I played a game of champs qualifiers today where my opponent shot at goal, it hit my keeper, the ball dropped, my keeper dropped on top of the ball, 2 of my defenders surrounded my keeper but yet my opponent just ran straight through my defenders and keeper, took the ball and dribbled it into the goal.
The mechanics in the game are terrible, my same team in squad battles acts completely different in rivals and champs. In rivals and champs passes are weaker and go in the wrong direction, defender ai won't defend, shots at goal just miss (sometimes even an open goal) or constantly hit the upright or cross bar, my players with much better stats are outrun by much slower players.