He can't say he's surprised by Bucky's lacking ability to cooperate with others enough to make the effort with Wrench, but he's aware he might be being somewhat ungenerous thanks to his frustration.

'But you're not mad at him', though. That gets a rather unkind little smirk.

Bigger things to worry about. Don't worry, Wrench, he's still mad. He just can't do anything about it, and right now working together is more important than being rightfully furious about his agency being taken from him carrying over to this hellhole.

Next time we try something, he's with me.