From Julian Lennon's page on Facebook

[Ken Burch]

38. Paul has some good points

I still remember, though, the humiliating way he treated George and Ringo at times during the Beatles' existence(Ringo caught Paul removing HIS drum parts and overdubbing drumming of his own, and there was that scene where Paul brought George nearly to tears by telling him EXACTLY how to play the guitar part and treating George not as the great guitarist he was, but rather as a slow-learning three-year-old. If you treat the people you work with like that, you've probably treated other people lower on the food chain far worse. Paul also cheated on his longtime 60's fiancee, Jane Asher, on many, many occasions(it's a miracle that he never passed on any std's to her after all that, since most of his philandering would have been unprotected sex) and was quite hostile to Yoko for getting involved in John(even though Paul himself wasn't in any position to judge anybody on that score)

George was a total shit to Yoko when John first got together with her(When Yoko had never done anything to George at all, and when George had shagged just as many groupies after marrying Patti Boyd as John and Paul had done, thus ALSO losing any right to judge Yoko OR John for anything, and then went on to sleep with Ringo's wife Maureen while Ringo was still married to her) and Ringo himself had a massive problem with booze for years that probably led him to do a great number of things that weren't particularly pleasant.

Yet all three of them, as well as John, had good sides, massively good sides, in spite of all that and brought much joy and hope to this world.

Look at anyone you admire long enough...and you'll find that they're a fdeeply mixed bag at best.