this game just with chance and often with any choice you loose
Try making more strategic use of your debuffs and Drama. Those are key to increasing your odds of winning. Remember, too, that the object of the game isn't to win matches, it's to get PR. If you are losing matches but still getting decent PR gains, you're doing fine. You can even choose to build around losing matches. I've done runs where I lost every single match in Career Mode and still got the Good Ending.