Promotion Games

How come I can win 5 to 6 games in row but as soon as it comes to a promotion game I lose . I can never win my 1st promotion games. It will take at 3 to 4 attempts. And it always seems when I play my 1st few promotion games. My players are slower than before not passing as accurate as they were. My defenders all of a sudden decide they want to be up with my strikers.  I press buttons on controller no reaction from player on pitch or theirs a pause like I press to shoot my player don’t react a opposite players defender all of sudden catches up slides in then my player decides to shoot. Opposite players can all of sudden shoot from anywhere and score. I shoot in front of goal and it will either go over the top or wide. Or opposition will all of sudden have superman in goal. I just don’t get what I’m doing wrong.