Why is Brother Kong so unpopular?

1, an open world adventure game promoted by Jiuyou. In the game, there are only three elements in the protagonist's switching, while the empty brother's elements are different and need to be cultivated separately.

2. During the training of air brothers, different skill books and props need to be upgraded. Later props are becoming more and more scarce, and the training cost is too high. At present, there is no mainstream lineup.