OK, she waffled some very embittered accusations . . .

I know what pissed her off. She doesn't like what Ewan did to songs (adapting and nicking tunes for his own work). She says they didn't 'belong' to him.
She might as well be as dismissive of Ashley Hutchings . . . hmmm, she probably has been.
Not a lot to do with "intransigence and argumentative temperament". Just "artistic differences".