Of course Arjuna said he feels defeated already. Nay, not defeated, but more deflated, like retired-hurt, to use a cricket term. Or maybe a hit-wicket? He didn’t even want to star in the war, the same one for which he had trained all his life!
So he finally came to Krishna and surrendered completely. “Krishna, I’m lost and I’m a mess. Please instruct me. Take me as your disciple. What should I do now?”
But let’s look at the other side of the battlefield shall we? Just days before the Kurukshetra war, the arch villain Duryodhana had a meeting with Krishna too. He was in fact offered a choice – either Krishna, or a massive army. Duryodhana chose the latter, because tens of thousands of soldiers are better than the Lord Krishna no? Or was it because he didn’t recognize that Krishna was an avatar of the Lord?
No, Duryodhana very well knew of Krishna’s true nature. In spite of this knowledge, he chose the army. Not just that, he also told Krishna thus, “I know what I am doing is wrong. I know I am on the wrong side of Dharma. I know I should be choosing you. I know I am a wicked person. But still Krishna, I am unable to do what is right.”
What is the difference here then? Simply one of ‘ego’. Duryodhana was just unable to accept that he needed help. He was unable to surrender to a greater power. Because he thought himself to be the greatest power. Arjuna on the other hand, realized that he was in a situation that he could not solve on his own. What better way then, than to surrender?