I took advantage of my parents situation so I could win an argument
Did your parents want you to win the argument?
My parents want me to better my communication skills.
While your parents are doing a good job trying to get you to communicate better, trying to win the argument is not the point. Even if you lose you still need to learn to have the same amount of charisma or you'd be seen as a sore loser.
I don't care bout what they're trying to do
You may not realize their intent now, but down the road don't you think you'd appreciate it all? Your parents are great at helping you be more charismatic, so maybe you should try a had and giving them a chance and not try to win this time? You never know if you can speak well in many different ways!