Noah might be the one who made him put his friend on the verge of death, but the Argentinian Captain understood that this was a competition. And he would have done the same if he ended in Noah's situation.
So he neither blamed the US team nor felt any goodwill towards them. But after receiving their timely help, his respect for them had increased tenfolds.
He understood that by surrendering, his team was out of the competition. Thus, even if he knew that the Package had healing substances, he wasn't allowed to get them.
Hence, he was extremely grateful that the US team didn't just stand there and watch their teammate die, just to hold into those healing substances, which were extremely important in this competition.
Juan's stabilizing situation was more than enough proof.
Alas, what he didn't know was that Felix had helped them not out of his kindness and goodwill but simply because he didn't want to see Olivia's guilty expression.