Steve can only shake his head in response. He clearly does have time for this as long as Bucky is sharing the same space as him. He does sympathize with Tony. He'd like to fix it somehow.
"You've got me." Again he can't help, but think that may as well be nothing to Tony. He clearly only ever favored Banner. While that's fine, it's also kind of annoying now. Dr. Banner isn't here. That would be too easy to send the pair off and just live out this weird fantasy with Bucky. "And you have to make time now because we're dealing with this. Whatever this is."