if yuuri had beat yurio, he would have retired after the GPF, though not necessarily happily. the way he was looking at yurio while watching his performance made it clear that he was still torn about the decision. but since he won silver he's determined to complete another season, and he gets to do so without worrying that he's taking viktor away from something he loves. plus the gap between yuuri and yurio was so small that they practically tied anyway. so ultimately, yurio winning was a good thing
yuuri deserved to win, he deserved it so much, he worked so hard and I love him and he DESERVED-
Just a quick clarification: the banquet was AFTER the competition not before. So by the time Yuuri was tearing it up on the dance floor, he had already been yelled at by the “Russian Punk” and he had walked away from Victor “Living Legend” Nikiforov.