The king was utterly dangerous. He never expected that someone from that faction would survive and target him, who merely provided some assistance but didn't act directly.
Based on what he had seen, the faction was doomed anyway, so it was better to support the ones crushing it to obtain benefits.
If he hadn't accepted, others would have done it.
"You faction was doomed to extinction since Ravier died! So, what if I obtained some benefits from it? Ravier's fame alone was what was supporting your small faction! You may be slightly stronger than me, but what can you do to the Origin Gods who destroyed your faction? Nothing! The strong ones decided the doom of your faction, so your faction was doomed. As simple as that!"
The king was trying to anger Lina to provoke that she made mistakes while fighting, but Lina didn't react at all.
She knew that what the king was saying was true, but she didn't care.