When OP protag isekai manga goes to a battle arc that spans over multiple chapters with people we hardly knew and care and almost no input at all from the MC...
Dividing the chapters more doesn't help.
The author really trying to check out every isekai trope isn't he.
We got a guy literally says he is joining for the participation reward couple of pages before but the 3 stooges decides to pick a bone with MC.
Btw if its that large of a threat to the city shouldn't participation be mandatory to...