Steve's face does... something, like he's trying not to frown and it's not really working overly well. Sure, it makes sense, that Bucky should see someone, talk to someone, who at least knows what it's like to be a soldier. So, that part seems okay, sure.

But the rest of it? Steve doesn't think Bucky owes anybody an apology, which is maybe why the whole frowning-trying-not-to-frown thing he's got going on. He gets trying to stop people that HYDRA might have enabled, through the use of the Winter Soldier.

He also knows that Bucky takes it much more personally, and nothing Steve can ever say will change his mind.

"Is that... helping, then?"