The game itself has so many issues like they dont have the correct way to apply the game mechanics where enemies tend to deal massive damage to players even on same Combat Power and the shard gacha system just broke the fun at all.
Imagine drawing more than 50 times and all you have is only SHARDS, not even single legit units at all. This game is beyond cheating in terms of fairness and balance to players, just waiting for dead in few months. Do not support this game by any means, they dont care at all.