Leading in all statistics except tackles = LOSS

This is a pretty noticeable observation.  If you spam tackle you can get wins even when you are getting killed in every statistical category.  All of a sudden in the 70-75' minute your players will begin to lose possession from simple dribbling,  passes to the player right next to you will go flying past them in the wrong direction.  Then when the other team literally scores 3 to for 4 goals the game play will go back to normal.  Start watching your games and see if this pattern is happening to you when you play players who are not using any tactics except spam tackling and wing bashing.