After a loss, the enemy may try to take you down a path of self-pity. People who feel sorry for themselves are miserable, and there’s no need to be unhappy.
“A happy heart makes the face cheerful, but heartache crushes the spirit.” (Proverbs 15:13). Jesus came to heal the brokenhearted and bind up the wounds.
Seek the Lord, and He will lift you from the pit of despair.