He is such a sore winner, always bragging about his success.
Он такой человек, который плохо ведет себя после победы, всегда хвастается своим успехом.
Definitions
A sore winner is a person who, despite winning a competition or contest, displays unpleasant or arrogant behavior, often gloating or being overly critical of the loser, rather than showing humility or sportsmanship.
