Watch the recording sessions toward the end. I think Let It Be. Yoko would sit next to John during the recording sessions. The others were stone faced and John was her puppet. This is probably what killed the group.
Yoko is an evil creep and John was a rather unpleasant person and a lousy father to Julian.
I suspect that John and Yoko wouldn’t have lasted 40 years. they barely got 12 and even then he’d left her in the middle for another woman.