Their way of fighting is attack power....and they are saying no to a black mage that can destroy enemy defense and make it so that the battle is faster..... wtf!!!
And why would you push for someone to outright leave your party? Try fighting without him and if it works out then kick him? Why would jump to random conclusions and not think things through?
I am a 100% certain this is a party that has been carried all their career either by the friend of MC or someone and has hardly any proper experience in fight other than being showy.
I am really wondering if they rank number number #4 in the world, then this world is really weak one, and the commentators are pretty shit people who don't really know about the dungeon, monster strength and player strengths, and have simply come to power using thier connections.