In addition to Ariel, there are two princes who also aim for succession.
The 1st Prince and the 2nd Prince.
The influential people of Asura Kingdom's upper aristocracy competed to bring one of them to power as a king, then drew the benefits of their backing.
As is almost always the case, with many supporters available, not everyone will be able to have their backing returned.
Because there is a rank in the minister's group, it's a natural course of events.
Those of low rank are neglected.