This whole battle was a mess.
1. The most important enemy was the queen locust, but MC didn't do anything to stop her. He stayed to struggle against weak enemies that was actually weak enough to be handled by the reinforcements that came afterwards.
2. Why did Art not know that those reinforcements were coming? Because they stayed at the back until after the queen locust attacked the stronghold. They ran to the frontline to escape, but acted like MC staying at the frontline alone was MC's mistake of not being able to trust others. Like they didn't ask him to do that in briefing.
3. Queen Locust one-shotted the strongest man in the kingdom while still in weaker form, but Urk blocked her attack easily even after she has unleashed her true power.
4. Queen Locust did nothing, just watching everytime Art and Urk did their skits.
5. Art for some unexplainable reason didn't unleash his power until he got "ordered" to.