self-quitter
nounUK /ˌself ˈkwɪtə/
US /ˌself ˈkwɪtər/
A self-quitter is someone who gives up on something by themselves.
He was a self-quitter and stopped going to practice after one week.
RELATED WORDS
OTHER MEANINGS
2. A person who leaves a job or task without anyone forcing them to.
The self-quitter walked away from the project on his own.
3. Someone who stops trying at a goal before finishing it.
She didn't want to be a self-quitter, so she kept running.
4. A person who quits a habit by their own choice.
As a self-quitter, he stopped eating candy all by himself.