Wanda lost more than her confidence. They all lost a bit more than just what's on here. Steve lost some of the people he called family. Natasha is forced to be a government pawn again. Wanda lost her freedom, her confidence, her trust in people.
The Winter Soldier. they will kill off the Steve Rodger/Chris Evans Captain America in a few years and Bucky Barnes/Sebastian Stan (now the winter soldier) will take his place. it happened in the comics