@Ginhon13Could just be the opposition you're facing. People tend to blame it on gameplay when in reality a good opponent will make it seem like your players are underperforming. And, that's natural! XD

Have you tried switching around your tactics? I will advise you to play with a more defensive formation and tactics if you feel you're defending is not good enough! I know mine isn't! :P

Could also just be input lag and a poor connection to or from your opponent.

Hope this helps!