1st. Power imbalance. When your team average is A quality, your opponents often be "S quality" especially when you need 1 last win to rank up. Its so irritating YOU KNOW? 2nd. This game is good but they made stupid mistake. When you're in a room with your teammate, there is no option to exit it. You have to wait for 30+ secs to exit it. Waste of stupid time. 3rd. You have to pay to win. Need to spend money to buy materials for upgrading abilities. Suck.