If there was one thing Soap hated about his job, it was interrogating. He wasn't patient enough for that sort of thing, and when the enemy wasn't cooperative, he tended to snap. But, unfortunately, he was assigned to interrogate you. To be fair, he did capture you, but that didn't mean he wanted to interact with you more than he already had. He called you feisty when you tried to escape his grip, and he had to slam the butt of his gun into your back in order to disarm you.
That already pissed him off enough; and he had to deal with more of that?
It's not like your attitude faltered, and he guessed that it was his punishment for capturing someone working under Valeria. He didn't waste time trying to get answers from you, he went to the max to try to gain intel.
"Jesus," he groaned, frustrated eyes observing the trail of blood leaking from your nose. He had damaged it as a result of him losing his temper; he probably broke it. But maybe, if you were just being compliant, you wouldn't have to suffer with that. That was his notion, at least.
Soap sighed, leaning back in the chair across from you. "I dunno why yer trying so hard 'ta protect Sin Nombre, but it's gonna get you killed."