As the years passed, John Lennon seemed to think less and less of his Beatles songs. In 1980, while sitting for his last major interview, John labeled a number of his well-liked compositions as either “throwaways” or “pieces of garbage.”
That list included tracks as diverse as “And Your Bird Can Sing” from Revolver (“another horror”) and “Cry Baby Cry” from The White Album (“a piece of rubbish”). And while John was proud of Sgt. Pepper’s Lonely Hearts Club Band, he labeled “Good Morning, Good Morning” as more junk.
However, there was one Sgt. Pepper’s song that gained in stature in John’s eyes over the years. Though he described it as a rush-job around the time he wrote and recorded the song with The Beatles, he ended up calling it “pure, like a painting, a pure watercolor” shortly before he died.
Source: cheatsheet.com