Ok, so first, this game, even in the ranked mode, is the EASIEST GAME. Maybe you could add levels of hardness or a super hard mode, because once you get really good at it, there’s just nothing else to do Than to play different modes.
The second topic is that, during the modes that are not the ranked mode, it is easy to win. Seven wins will easily win the game. Maybe adding more of a challenge of wins to the player will help.