Bucky's memory was coming back slowly but surely. He had been told that Hydra hadn't managed to erase his memories completely, only block his accesses to them. His brain had always tried to heal this damage. It was why they had to keep wiping him.
Things weren't coming back in any particular order. Steve was a great help with sorting the memories before and during the war. But it wasn't just Buck's memories coming back, it was also the Winter Soldier's. He knew it made Steve uncomfortable that he had asked Natasha for his file but it helped to organise his memories rather then just letting them pop up and blind-side him. He couldn't really explain how these were memories stolen from him as well. That remembering all the people he killed, faces blurring together into a smeared mess, all the pain and isolation, was worth it to have what he had now.
He had context for things.
As the Winter Solider he had been used to his body just knowing things. The first time he remembered learning to use a gun, just how bad he had been when starting out, was first time he really felt human again. He hadn't always been a weapon.
And it wasn't as if his time as the Winter Soldier had been all misery. They could have hardly kept him as a functioning asset if all they did was torture him after all.
