a question of worth (слэш)

Bucky can't explain to anyone how strange it is to wake up in Wakanda with five years gone in a blink, in a second. The last thing he remembers was trying to get to Steve, and then General Okoye is telling them—because it's not just Bucky, it's so many people—that five years have passed and the rest of the world went on without them.
He should be used to it, he supposes, but he had really thought that he was done sliding through time, finished missing years. He had promised himself—had promised Steve—after that last time in Wakanda to get rid of the trigger words that it would be the last time, that he wouldn't leave like that again. He had thought it was a promise he could keep.
~o~
In which Steve and Bucky return the Infinity Stones, and return to a world drastically changed from the one Bucky left five years ago, and Bucky has to struggle with the knowledge that his best friend held Mjölnir, and at least briefly had the power of a god. So where does that leave an ex-brainwashed assassin?