My dear Jinxuan is genuinely feeling aggrieved.
Seriously, he's a real man, and sometimes he needs some dignity. It's okay if he acts humble in front of his wife. No matter how much his wife dislikes him or mocks him, he doesn't mind.
But when the three brothers from the Di Family look down on him, it's different. It gets to him sometimes.
He also feels like he can't protect Di Jinxuan properly.
What he doesn't realize is, the Di Family has three brothers, and one alone is already incredible, let alone three.
If it were just one, their strength would be comparable to Nangong Jin's, but the combined strength of three could easily overpower him.
He's a bit reckless, trying to compete with three people all on his own!
This matter could have been solved perfectly by him; in fact, he already solved it, but he didn't anticipate the old tricksy left some backhand, and Di Jinxuan got poisoned by Gu, which only he could detoxify.