[1] The song is the title track and lead single off Whitcomb's 2024 extended play Quitter, released via Atlantic Records.

[2] Whitcomb wrote the song while on a trip to write with Nolan Sipe in Los Angeles.

[3] In writing the song, Whitcomb took inspiration from his own personal experience overcoming addiction.

[4] Rosie Long Decter of Billboard Canada described "Quitter" as "anthemic folk track in the mould of Noah Kahan", noting a "a kick-clap beat" and Whitcomb's "growling vocal".

[5] Alli Patton of Holler favourably spoke of the song, noting "sharp strums and a shuddering kick drum", as well as "a torrent of rhythm and steel.