He's not upset so much as he constantly needs to prove himself and his valor - his worth as a man.
Lennie killed George Because he was mad and vey upset .
Curley beat up Lennie in "Of Mice and Men" out of anger and jealousy. Curley was upset over his wife's flirtatious behavior towards the ranch workers, including Lennie. Being a small man, Curley also took out his frustrations on Lennie to assert his dominance and power over him.
Curley's wife yells at Lennie for ruining her chance of being in the movies and for making her lonely on the ranch. She accuses him of being responsible for her unhappiness and complains about her life and her marriage to Curley.
He was very upset; hearing his wife's death :'(
Carlo Curley's birth name is Carlo James Curley.
Maddy Curley's birth name is Madelyn Jane Curley.
Malcolm Curley's birth name is Malcolm Coryell Curley.
Pauline Curley's birth name is Rose Pauline Curley.
Curley's wife will rather be an actress in the movie.
Curley attacks Lennie out of anger and aggression, blaming him for the death of his wife. In retaliation, Lennie crushes Curley's hand, revealing his immense strength and inadvertently causing Curley significant harm.
No Curley was a Crow Scout for Custer.
Candys opinion over curley is that curley that curley became cocker´n ever since he got married, and that curley is a vaseline head.sorry if my answer is middle school like =p