If you can't defend, it's usually the player at fault. While I have been the subject of classic FIFA gaffes, with 3 defenders I'm solid at the back. You just have to do it right. Tracking runs, switching players at the right time, timing your tackles right. Slow defenders have more troubles, but you don't want to try chasing players with them.
People tend to blame the game rather than their own inability to defend.
People tend to blame the game rather than their own inability to defend.