In 1970, Paul McCartney sued The Beatles. He explained that he did it to protect the band’s catalog of music from band manager Allen Klein, but the move also aired out a great deal of the group’s dirty laundry. The group’s inner workings were made public, and John Lennon, George Harrison, and Ringo Starr had harsh words to share about McCartney. Starr, at least, tried to soften the blow of his words, but he still insulted his former bandmate.
In 1970, McCartney sued The Beatles to dissolve their contractual relationship when the other members appointed Klein to control the band’s finances. McCartney never liked Klein and didn’t trust him to manage the group’s affairs.
“The only way for me to save The Beatles and Apple — and to release Get Back by Peter Jackson and which allowed us to release Anthology and all these great remasters of all the great Beatles records — was to sue the band,” McCartney told GQ. “If I hadn’t done that, it would have all belonged to Allen Klein. The only way I was given to get us out of that was to do what I did.”
Source: Emma McKee/cheatsheet.com