@JWChibi
My thoughts exactly.
I wouldn't have questioned it they were something like super-elite guards, but they were having troubles with the standard orcs even before the orc king came up.
It's already a bit dubious when it happens to standard nobles or princesses, but here he's the king himself. Is his country so weak that he can't afford better guards?
Wow, this is the first fantasy story with a meeting of the king like this. Its always strong adventurer mc is summoned to meet the king, hero summoning, or mc saves princess