Author Existence Failure: Various remixes, outtakes, and demos of unfinished Lennon recordings have been released, starting with the Milk and Honey album. This included Lennon's fellow Beatles adapting two low-quality Lennon home demos into "new" Beatles songs in 1995, "Free as a Bird" and "Real Love."
Creator Breakdown: His highly acclaimed 1970 solo album, John Lennon/Plastic Ono Band, was the fruit of months spent in "primal scream" therapy, during which he brutally confronted his feelings of Parental Abandonment and disillusionment with his life as a Beatle. Another single from this era, "Cold Turkey," is about his struggle to get over his heroin addiction.
To a less dramatic extent, there's also Lennon's earlier Beatles songs, "I'm a Loser" and "Help!", the product of what he later called his "fat Elvis" period, in which he felt depressed, trapped and empty inside after the thrill of Beatlemania had worn off.
Some of his later solo albums also reek of unfortunate situations taking their toll on the musician. Mind Games speaks from a time of disillusionment and a nagging threat of deportation. After that is Walls and Bridges, where John does not seem to be much better off for his temporary split from Yoko Ono.