Quote Originally Posted by Buffalobiian View Post
I don't get why that guy goes "I'm losing my trust in people" or some shit like that. Mikasa never betrayed him in any way or form.. they don't even know each other. I can deal with a jealous rage at Eren even if it's a textbook response - at least that makes sense.
GG mistranslated that. The exchange goes "What did you just wipe off on my back? - My faith in humanity."

What he means is he has lost all hope since a loser like Eren is palling around with Mikasa.