just bcz a formation used to work for Level 2 don't mean it will keep working at level 3
your team lack of width is been exploited by other teams
try to make condition and moral 100%
give max win bonus
try to play with a formation with width, use 4141 as a start and put up arrow on LM/RM/DMC/ LB/RB, counter , flanks, long facing teams close to you and counter other teams formation if they are weaker
don't use same formation every game !! you don't treat different illness with the same treatment? do you?