The way to become unbeatable is easy, and anyone can do it! I'm not sure how to do it in the iPhone, but for android devices, it is simple! Just click and hold the Top Eleven app icon, then in the pop-up menu simply select "uninstall". Now you cannot be beaten. Your team will eventually be recycled, but you as a manager will never have to lose another game ever again.

I'm sorry if this isn't exactly what you want to hear, but its the only way to become unbeatable. Hope this helps.