It is the reason many find the game difficult. Without actually viewing your tactics/screenshots, I am guessing you play attacking football, and most oppositions will sit back and do all they can to defend against you, sometimes having all players behind the ball, making it incredibly difficult to break down. It is down to you to try and find a way, whether its through 'attack attack attack', drawing the opposition out via deep possession/counter attacks, direct to a target man with a poacher... lots of ideas. Also keep an eye out for any opposition weaknesses.