“Crippled Inside” from “Imagine” is a “corny Country-Westerner” as described by Lennon himself (about 1:05 minute in) when discussing the tracks he had ready to be placed in the tracklisting, before proceeding to sing it briefly.
I listened to “Imagine” (the album, not the song) for the first time when it was (what would have been) his 70th birthday in 2010. If there was a time to start listening to his solo material, it was definitely then. And after the calming, piano driven ‘anthem’ comes this bouncy track.
It’s about putting on a false appearance and pretending to be happy when in fact you actually feel worthless. Some take it to be an insult song to Paul McCartney; they weren’t getting along so well at this time. Figure it out for yourselves.