Bucky never chose to fight, he never liked it. When he was younger, back in the 40s, he'd only get into fights to defend Steve. Yet somehow, despite his little interest in fighting, that's all he had done. He was drafted to war, taken by HYDRA and turned into a their puppet kept alive for years. Then he fought the avengers, later he fought with the avengers. He never got a break, and god that's all he wanted. He never chose to fight, he didn't want it... But he couldn't seem to stop it either. When he finally thought he could drift away from that Sam called him into action again.
He drops on the couch, body aching from sheer exhaustion. He can feel the bandages sticking to his side. He's still mad at himself for failing to dodge that bullet. It probably needs changing but if he has to get up to change the bandage he feels like he might just die. His body, sore, slowly adjust to the cushions, his back relaxing against the soft material. The pain on his side is sharp, he's had worse, of course, but it's still bothersome.
The mission had lasted a few days and while it had been an absolute success, he hadn't slept more than 2 hours in days, and he's starving. If he had any clue of how to do it he'd try to order some food... He's so tired, he just wants to rest