hmmm, don't know much about your team but before 2 seasons I added 5-6 new players in my team and I started the league with 2W-1D-1L, but after that my team improved a lot and won the league.
Maybe it's time to change your formation because if you're playing with same people they study your style.
Try to begin the games with defense and after a while change it to attack or normal (examine number of shots)
Try to find counter formations for your opponents.
Check your players that have continuously rates of 5.