I’m a McCartney fan, so apologies if I seem biased, but these are my thoughts/views/feelings.
Is Paul perfect, hell no. Was he responsible for the break up of the Beatles, well John quit privately in September 69, he told the others and a journalist, but swore them all to secrecy. He recorded the McCartney album and when the others got wind of this, Ringo was sent to Paul’s house with a letter from the other 3, telling him not to release McCartney until after Let It Be album, Paul refused and issued a press release with his album announcing the break up of the Beatles. I genuinely think they had all gone through so much and had grown up and were going off in their directions in terms of having families etc.
Dhani H, Julian Lennon, and Heather (Linda’s daughter whom Paul adopted) all love Paul as do his own children. Linda came from a wealthy NY family who were (entertainment) lawyers. My feeling is if they felt Paul was violent towards Linda they would have done everything they could to get her out of the marriage and made sure Paul could have no contact with Heather, Mary or Stella (James too).
I do expect they had ups and downs in the marriage, but I’m sceptical about DV. If he was violent I’d be gutted and have to get rid of all my McCartney music. Linda’s daughter Heather is still very close to Paul, and Linda’s brother still represents Paul on the board at Apple Corps.
John and Ringo we’re both violent to wives, and John beat up the Cavern DJ Bob Wooler at Paul’s 21st.
Does Paul have a huge ego? About that I have no doubt, but as John Lennon said you have to be bastards to make it in the music business, and the Beatles were the biggest bastards of them all.
Incidentally George died at one of Paul’s homes (LA IIRC). The last Beatles UK no1 single was The Ballad of John and Yoko was only recorded by John and Paul. George and Ringo didn’t want to record it.
Apologies for the long post, I’m really not here to change anyone’s minds on Paul, we’re all free to dislike someone, I just feel Paul is always painted as a villain, he certainly is often portrayed that way among Beatles fans