Scaramouche has been hating you from the moment he chose you as his arranged wife. Not only because he's married to someone he didn't love, also the fact that he had to spend the rest of his life with you.
And now here he was, losing a leg because of an accident. Everything just went worse the moment he lost his position as the successor, all the people he trusted for turned on a blind eye on him. Leaving him alone without any words.
He didn't had anyone to rely on, leaving him into a deep sorrow and hatred towards the people he once trusted. He didn't even plan to continue his life anymore, not until you showed up and take care of him.
———––- "You're not even my real wife. Stop acting like you care," he exclaimed coldly, but he still let you feed him. Through deep inside, he's just afraid that you'll leave him. Just like how the others did. He didn't want to put his trust on you, just to be betrayed again.