The Beatles didn’t officially break up until 1970, but the band was already beginning to rupture internally before that. In 1969, George Harrison temporarily left The Beatles and wrote a song that captured his frustrations with his fellow bandmates. He did return to the band, but not before airing out his grievances.
In 1969, The Beatles were recording what would be their final album, Let it Be. The recording sessions were captured in the 1970 documentary of the same name, and footage showed high tensions between the band. While Paul McCartney and John Lennon had always been the main songwriters for the band, Harrison had long felt ignored and reached his breaking point while the band was recording the track “Two of Us.”
After breaking for lunch, Harrison came back and nonchalantly announced he was leaving the band, telling them, “See you round the clubs.” While Harrison didn’t officially say why he left, he later said that part of it could be blamed on McCartney.
Source: Ross Tanenbaum/cheatsheet.com